1966 pontiac 421 engine specs 1966 pontiac 421 engine specs

These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. Price $15500.00. 400 Ram Air (1969) / Ram Air (1970), aka Ram Air III, Learn how and when to remove these template messages, Learn how and when to remove this template message, "Tested: 1968 Pontiac GTO 428 / Royal Bobcat", "1969 Pontiac Grand Prix 428 specifications | technical data | performance | fuel economy | emissions | dimensions | horsepower | torque | weight", "Muscle Car Horsepower How Exaggerated Was It? The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. 421 CID V8 - 4BBL - Automatic - P.S. Pontiac listed the 290hp (216kW) rating at 4000 rpm for a motor that had a 5700rpm redline on the factory tachometer. On premium fuel, it was rated at 207 hp at 5200 rpm and . However, a few dealers would offer them in the GTO or Firebird and do their own installations, such as Royal Pontiac who offered the "Bobcat" conversion. / 8.3 mpg (U.S.) / 3.6 km/l, more data: 1966 Pontiac Catalina 2 . The results showed Pontiac that an L-head simply couldn't compete with an overhead valve engine. This included the ESC (Electronic Spark Control) distributor and controller borrowed from the 301 Turbo, which allowed for higher timing without the penalty of engine damaging pinging or preignition. Optional engines included the 356hp Tri-Power as seen on our feature car (code WH manual or YJ auto), or the 421HO, rated at 376hp . A higher-output version was offered, called the 326 HO (High Output). Pontiac engine production records report that 190 XS-code 389 engines were built during the 1966 model year. Returns; . Standard ratio with the 400 was 3.55:1(except 3.36:1 in Firebird for 1969) regardless of transmission(3.23:1 for cars with air conditioning). Original plans called for a forged crankshaft, although actual production SD455s received nodular-iron crankshafts with minor enhancements. In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. Head ID Location Final torque ratings may vary and need to be determined based on application and parts used. Pontiac had prepared for the forthcoming cancellation of the venerable 400 by producing large volumes of the stronger cast "XX" 400 blocks in 1977 that were assembled in 1978, and stockpiled at a warehouse by the assembly plant for later use. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . Pre-Owned. The W72 package was a standalone option, and although was discounted when ordered in conjunction with the Y82/Y84/Y88 Special Appearance package, did not come included with Special Edition Trans Ams, it remained an extra cost option. This was underrated at 330hp (246kW). . 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. Rear Main Cap. See profiles, photos, and specifications of, Muscle cars came in many shapes and sizes. Ram Air induction was optionally available with the 455 HO in the Firebird Formula (standard on Trans Am), and the 2-door LeMans (including GTO). An innovative design feature was mounting the rocker arms on ball pivots on studs set into the cylinder head, rather than using a separate rocker shaft. [2] This was the engine installed in the Pontiac Executive line of large cars[3] and its largest station wagon, the Pontiac Safari. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). This was the last run for the 455 (7.5 L) motor from Pontiac, and production ceased on the 455 this year as it could no longer meet the emissions requirements any longer. It shared the 389's 3+34in (95.3mm) stroke, but its bore was 3.78in (96.0mm) for a displacement of 336.66cuin (5.5L). Splayed main caps, head bolts tie into main caps. Cam choice is always extremely important, and Jim decided to go with an aggressive Crower mechanical flat-tappet stick with 247/252-degrees duration at 0.050 and 0.515/0.525 lift (0.495/0.505 with 0.020 lash) with 1.6:1 rockers. Today, they have an average value of $430,000 in #3 (Good) condition, while the best in the world is worth about $550,000. Coil: GM Tri Power engine however was optional. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. It was offered in the following forms: For 1957 the V8's stroke was increased to 3.5625in (90.49mm), for a displacement of 347cuin (5.7L). When Robert Critchfield took over as general manager in 1952, he launched an ambitious plan to move Pontiac into the upscale, mid-range market occupied by Oldsmobile, and that demanded V8 power. The Pontiac 421 HO was the king of the streets in 1963, producing 353 and 370 horsepower depending on carburetor configuration. The shaker wore the decals "455 H.O." There are no manual transmission equipped Trans Ams that came factory with the standard L78 400 motor in 1977-79. The engine came with 543797 (4-barrel) and 9770716 heads for the tri-power and special exhaust manifolds and a 7H cam with 292deg. The other major difference between the "typical" Pontiac engine of the time was that this one used the large . Windage tray: Original PMD '70 455, fabricate fit, no bosses at cap #2 The compression ratio will be 10.6:1. I don't know if it can be done, but I'm going to try." See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. Oil pan: 8-quart with extended pick-up, fabricated retention clamp The Ram Air IV replaced the Ram Air II in 1969. In addition to the inline 6, Pontiac used the Oakland V8 for one year, 1932, debuting the Pontiac straight-8 engine in 1933. It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. Furthermore, this car had an automatic, air conditioning, a 3.08 axle and weighed 4,010 pounds (1,819kg). Pontiac differed from other GM Divisions and most other manufacturers in producing only a single small block V8, rather than adding a larger big block to its line-up. First offered as an option in 1963, the 421 HO came in a 4-barrel engine of 320hp (239kW) and one Tri-Power H-O version with a hotter cam and efficient iron exhaust manifolds and rated at 370hp (276kW). The 1975 455 HO package received some negative press/reviews as some buyers expected to see a return of the 1971-1972 engine, and were disappointed when they received the lower output motor. The 301 Turbo was unique since it had a beefier block than the 197779 versions (which carried on in the non-turbo versions in 1980 and 1981), a very mild camshaft with 0.35in (8.9mm) lift and 250 degrees gross duration, a 60psi (4.1bar) oil pump to ensure adequate oil to the oil-cooled Garrett TBO-305 Turbocharger, a rolled fillet crankshaft, a fully baffled oil pan, and a specific 800cuft/min (23m3/min) Quadrajet carburetor. It featured the "744" 301/313 camshaft, which offered more duration and overlap than the "HO". Royal Pontiac developed the prototype of the package on their 1965 GTO drag car and Pontiac picked up the idea and in August 1965 Pontiac offered the new Fresh Air package to dealers consisting of the parts and instructions needed to make the hood scoop functional, including the metal tub to mount to the carburetors and rubber gasket to seal it to the underside of the hood. For a few more ponies through better oil control, a factory full-length windage tray will be added, since Pontiac didn't use one on this engine originally. . The 421SD was available in 1961 as a dealer option or over the counter then in 62 and 63 from the factory, and was fitted with a list of internal modifications designed solely to withstand the abuse of drag racing. It was rated at 366bhp (273kW) (gross) in the GTO version. 1967 was the last year for closed-chambered heads. In addition to the more refined cylinder heads, block casting reinforcements in the lifter galley and main bearing oil pan rail area, it had forged connecting rods with larger 716-inch-diameter (11mm) bolts. Unfortunately, there were no improvements in the casting number "01" small-valve high-velocity heads, which would have yielded greater improvements in power. It added '421' engine badges on the front fenders, 2+2 insignia on the deck lid and rear fenders, and simulated louvers behind the front wheel cutouts. All W72 equipped Trans Ams featured the "T/A 6.6" shaker decal. or Best Offer. The valve angle was reduced from 17 degrees to 14 degrees for better breathing. As a result, it was remarkably free of teething problems. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). 1966: 421: 9782611 (late) 1967-1969. 1966 Pontiac Catalina technical specifications and data. The SD-455 used round-port cylinder heads similar to those used on the 1971 and 1972 455 HO, with specific "LS-2" intake and cast-iron exhaust header manifolds. This money bought a potent 389 V-8 with 267-283 bhp . 1962 Pontiac Catalina, Royal Bobcat Super Duty 421. As Pontiac's 1967 performance brochure said, "You can add the Ram Air induction hood scoop and new high output cam and valve springs to the Quadra-Power 400 for better top end breathing." NASCAR race cars embody the muscle car philosophy of power. Here is another number to ponder: 370 hp. 1. Also, a rumored 75 cars were built with non-Super Duty 421 engines rated at 320 bhp. It had a four-barrel carburetor, dual exhaust, and higher compression, and was good for 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 - 1966 and the final year, 1967. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. . The four-barrel version, set up for sustained high speeds, had 390 hp. . Preparation: Weigh, soap-and-water wash The W72 Performance Package also included an upgrade to the rear differential ratio, setting the rear gear ratio to 3.23 for all 1977 and 1979 W72 Firebirds, with the exception being 3.42 for 4-speed equipped W72 Firebirds in 1978 only. The 421 used the same 4.120-inch bore but used the 4.0-inch crank from the 421 it replaced. A concave rear window, fender skirts, and ribbed die-cast lower body trim, augmented the Grand Prix's upscale appearance. Carb: (3) Rochester two-barrels PMD [8] All of these improvements provided the W72 with a power rating of 200hp (203PS; 149kW) at 3600 rpm and 325lbft (441Nm) of torque at 2400 rpm, while the standard L78 400 only produced 180hp (182PS; 134kW) at 3600 rpm and 325lbft (441Nm) of torque at 1600 rpm. Hewing to GM's standing edict limiting engine size to 400 cu in for its midsize and smaller cars, the 360hp (268kW) (underrated),[citation needed] the 400 cubic inch Ram Air V-8 was the most powerful and advanced option available in the 1967 GTO and Firebird. It requires a compression ratio of at least 10.25:1. Some 400s were dealer installed. The 421 engine is available only with related heavy-duty driveline components. Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. Simply put, what good is the power if the engine does not last? An evolution of the RA IV and H.O. The 421 badging was standard on the 2+2, the 421 H.O. The V8 was phased out in 1981, replaced by GM "corporate engines" such as the Chevrolet 305 cu in small block V8. Regarding Crower's upgrade suggestions for its . Though never factory-installed in any car, the ultimate engine of the Ram Air line of engines was the tunnel-port Ram Air V. In 1969 Pontiac created four versions of the Ram Air V engine: a 303cuin (5.0L) short deck version for SCCA Trans-Am racing, a 366cuin (6.0L) variant for NASCAR, a 400cuin (6.6L) version for street use in GTOs and Firebirds, as well as a 428cuin (7.0L) adaptation for drag racing. The next 1 or 2 numbers represent the date, and the last number is the year. The 389 was the standard engine on the GTO up to 1966. Brand: Fel-Pro head and intake/ SCE pan and timing cover HP = flow at 28 in/H2O x 0.257 x # of cylinders. For '65, the 421-cid V-8 became a standard part of the option package, and for '66, Pontiac made the 2+2 a separate model, still based on the Catalina two-door hardtop or convertible.Flamboyantly styled and expansively proportioned, the 2+2 was unbeatable for sheer presence. The mighty Pontiac 421 was a star on the drag strip and a super nova on the Nascar tracks of the first half of the 60s. . In 1967, the Pontiac 2+2 became an option on the . (imp.) Paul Stenquist. Information and specs for the Pontiac 421 V8 engine. Continue with Recommended Cookies. Pushrods: LPC chrome moly Along with a cam swap it boosted horsepower from 325 hp with the four-barrel carb to 348 hp in '64. Mods: Intake port match, valve bowl blend, improved short-turn radius It was rated at 310hp (231kW) @ 4800rpm and 400lbft (542Nm) @ 3,000rpm on 10.5:1 compression. By early 1979, orders for the W72 package were being rejected by dealers as they supply had run dry. This is it! The new-for-1965 "Venturi" body shape and curved side glass were carried over with updates front and rear. [19], Parts for Ram Air V engines are not readily available. In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). Effectively, Pontiac's V8s were all small blocks, sharing the same connecting rod length 6.625 in (168.3mm) (except for the later short deck 301 and 265 produced in the late 1970s and early 1980s before Pontiac adopted universal GM engines). Pontiac engineers tested their 269cuin (4.4L) V8 in 1949 or 1950 against an OHV Oldsmobile Rocket V8 303cuin (5.0L) downsized to 270cuin (4.4L). In 1974 it was used in the GTO and was rated at 200hp (149kW) (net). Rocker studs: ARP special 34-in bottom With some WS6 "Trans Am Special Performance Package" bundles in 1978, the W72 engine was incorporated with the WS6 option group and not listed on the dealer order invoice. Keepers: Comp Cams race locks It had 2-bolt main bearing caps in 1969, but went to a block similar to the Ram Air IV's in 1969 that was drilled for 4-bolt main bearing caps (but used a cast crank and cast rods). The most famous S/D of them all. The 1979 Firebird model line was the last year for the Pontiac 400, and by this point not only was it required with the 4-speed manual transmission, it also required the WS6 Special Handling Package as mandatory equipment. The engine build will be discussed in two parts. Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn . 1967 - 400 Ram Air Code 97. On the invoicing for the 1979 model year Firebirds, they had the option listed as L78, however, every 1979 400 equipped car received a W72 engine. Maximum flow at 28 inches of water Length: 8.750-inCAM 455 (7.5) Buick Gran Sport, and 455 (7.5) Oldsmobile 442). Primary tube diameter: 1.75-in Jim told HPP, "Since I was a young man in the '60s, I always thought how great it would be to find a true 100hp in a legendary 421 Tri-Power setup that retained its iron heads and intake. Ultimately Pontiac produced only 295 1973 SD-455 Firebirds (252 Trans Am, 43 Formula). Engine options for the 1966 Pontiac Ventura were a 389 and 421 cubic inch V-8. gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS . Pontiac Heads; Pontiac Engine Torque Specs; Pontiac Cars (Body Types) Pontiac Engine Information; Instruction Sheets; Compression Calculator; Ask a Tech Question; Customer Service. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. 5 January 2007. Nevertheless, there appears in the October 72 issue of MOTOR TREND, a road test of a 1973 SD-455 Grand Am. Engine Year Info Spark Plug Plug Gap Point Gap Dwell Angle Timing (BTDC) Idel RPM Manual Tran. The overhead-cam six-cylinder engine was new for 1966 and the standard engine in the Tempest and Tempest Custom. The 421 Super Duty had been the first of these, and their large bore and stoke made them popular in NHRA and NASCAR competition throughout the '60s. The 400 remained in production through the 1978 model year, with 1979 cars receiving engines produced the previous year. Fuel line size: 38-inch, 516-inch to carburetor Preparation: Magnaflux, check for equal stroke and index, grind, polish 0.010-in Here are features on more than 100, Muscle cars created their own culture. These muscle car profiles include photos and specifications for each model: For related car information, go to these articles: Please copy/paste the following text to properly cite this HowStuffWorks.com article: the Auto Editors of Consumer Guide Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). They came up with a 269-cubic-inch (4.4L) L-head design. Ram Air induction was optional in the GTO, though power ratings were unchanged. Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. Piston pins: Icon, SAE 1016 to 1022 By 1965 and 1966 the same combinations would be rated at 338hp (252kW) for the 4bbl and the two Tri-Power versions would be rated at 356hp (265kW) and the H-O version at 376hp (280kW). Plans were made to produce Firebirds and GTOs with advertised ratings of 355hp (265kW) and 375hp (280kW) respectively but concerns about emissions, the response of the automobile safety lobby, and the warranty implications of a high-revving street engine led to cancellation of the program.[why? The Ram Air IV used the Ram Air II's camshaft but lift in the Ram Air IV was increased to 0.52in (13mm) thanks to the use of 1.65 ratio rocker arms (vs 1.50). For the first time, Pontiac offered Tri-Power, three two-barrel carburetors with a sequential linkage (replacing the previous dual-quad set-up). Now select an engine model (if applicable) -- Pontiac Engine Models -- All Pontiac Kits 151 301 326 350 3800 389 4-cylinder 400 421 428 455 Brodix Heads Edelbrock Heads Iron Duke L67 Pro Stock Dart Heads Pro Stock Heads Ram Air Runner Heads Super Duty Generic V8. As with all other Pontiac V8 motors that evolved from the 316 V8, the 421 was simply a bored out and stroked version of the popular Pontiac 389 V8. Compression Ratio: 10.6:1 effective The beginnings of Pontiac's iconic Ram Air dynasty began during the 1965 model year. Like the 326, it was offered in both 2-barrel and 4-barrel versions. Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified engines. Rod bolts or studs/head bolts or studs: ARP cap screw supplied in Howard's rods / PMDOILING SYSTEM Using an equation the author has provided in HPP many timesmost recently with The Mule engine seriesit was revealed that around 228.6-cfm flow though the intake port of the cylinder head is required to produce the desired 470 hp. Prices ranged from $2,760 to $3,220 . [citation needed] It was the first engine that incorporated Pontiac's round-port head design in a production vehicle, however the intake port was the same as other D-port heads, leaving a head which exhaust port could nearly match the intake at high valve lifts. Initially marketed as a 287cuin (4.7L), it went on to be manufactured in displacements between 265cuin (4.3L) and 455cuin (7.5L) in carburated, fuel injected, and turbocharged versions. Engine block and cylinder heads were cast at Saginaw Metal Casting Operations then assembled at Tonawanda Engine before delivery to Pontiac Assembly for installation. To learn everything you need to know about car engines, see. Boost was wastegate limited to 91psi (0.6210.069bar). . The 421 SD Tri-Power engine offered during these years produced the highest horsepower of any motor in the Pontiac V8 lineup at 376 bhp. From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. The premier SD 421 cylinder head was the late 1962-early 1963 casting #9771980 aka "980", featuring a larger 11.3cuin (185cc) intake port volume, flowing 230cuft/min (6.5m3/min) @ 28in (710mm). Engine displacement is a function of bore and stroke. ][citation needed] T, While the exact total number of Ram Air V engines produced is not positively known, only about 25 303cuin (5.0L) engines were produced and about a dozen 428s and 366s. This camshaft sported a 308-/320-degree duration with 0.47-inch (12mm) lift. Pontiac Engine Torque Specifications. The 326 subsequently became the optional V8 engine for Tempests, and later the Pontiac Firebird, through 1967 and maintained the 17 degree cylinder head valve angle for its entire production run. Sponsored Stories . After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400cuin (6.6L). Intake: 218 cfm at 0.500-in It featured a smaller bore of 3+34in (95.3mm) coupled with the same 3in (76.2mm) stroke of the 301 (same bore and stroke used by Chevrolet when the first small block motor was introduced in 1955). 068) to 301/313 (No. The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. Open pressure: 282 pounds at 1.100-in 1966 Pontiac Catalina . The four-barrel 400 was a popular performance option for many of Pontiac's cars. Preparation: File-fit for end gap if needed, wash The crankshaft in the 428 had a "N" cast on them (designating nodular steel) as opposed to the 421's Armasteel. While all this sounds great, remember the engine will have to retain the small 1.92-inch intake valve because chamber space is too tight for larger ones. These are general guidelines. The 2+2 reverted to option status for '67, then died, a proud relic of a time when big cars, Pontiacs in particular, ruled the streets. To learn about it, read. The 1966 Pontiac Ventura doesn't necessarily come up when speaking of 60's muscle cars, but the type of V-8's offered with the Ventura meant plenty of power. Cougar pulled out of Mustang's shadow with the striped and spoilered 1969 Mercury Cougar Eliminator. Angles used in valve job: 30-deg intake, 45-deg exhaust seat, width 0.040-in intake, 0.060-in exhaust Tri-power engine rated at 376 hp. All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". The engines feature a cast-iron block and head and two valves per cylinder. He thinks the stock exhaust flow of 180 cfm will suffice for this build. In basic 2-barrel form it produced 290 horsepower and 428ft. pounds of torque in 1968. A new engine was fast-tracked, its relatively late start allowing it to take advantage of developments proven in the Oldsmobile V8 and Cadillac V8. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. Laconic would be one way to describe this Pontiac's eBay listing, all it states is, "1966 Pontiac Ventura, 421 Tri-Power, 4 speed Runs/ Drives Great, Very Clean - Garage Kept".OK then, now you know what I know. The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. All Pontiac Bonneville Convertible versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . 744) and a new valve spring package with dampers to positively control valve action. Pontiac first offered the 2+2 as a Catalina engine, suspension, and trim group in 1964. The L75 455 engine continued as an option into the 1976 model year for the Trans Am, however, Pontiac opted to drop the "H.O." Power output ranged from 135hp (101kW) to 170hp (127kW). Headers: Hooker Super Comp (for dyno test) . While production of 196970 A-body Ram Air IV cars was low at just 1563 units(759 1969 GTOs including 302 Judges, and 804 1970 GTOs including 397 Judges) 1969 and 1970 model year F-body Ram Air IV cars were even rarer at just 245 total units produced. This was to ensure there was enough fuel to cool the cast offset dished pistons. ft. After the SD-455 was certified with the new cam, it was production-ready but was then further delayed by the EPA mandating Pontiac recertify all of its engines when the EPA discovered that part-throttle emissions exceeded the limits. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. in. Offered on select models from 1957 through 1966, Pontiac's Tri-Power induction system added a new dimension of performance to the General Motors brandand a colorful new term to the hot rodder's vocabulary. None of Pontiac's Ram Air engines actually enjoyed any true ram air effect. Free shipping on many items | Browse your favorite brands | affordable prices. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. For the truly obsessed, 16 Grand Prixs were built with Pontiac's 421 Super Duty engines, rated at a staggering 370 bhp. The W72 also featured a camshaft with a higher duration, finer tuned 800cfm Rochester Quadrajet, insulated fuel line, larger 60PSI oil pump, chrome valve covers, a larger harmonic balancer, and the "T/A 6.6" Shaker decal. ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm Balancer: Original PMD rebuilt by Damper Doctor A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. In the early '60s, the engine program at the Pontiac division of General Motors was a wide-open operation that bustled with innovation. The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). Make way for one of the baddest muscle cars of all time, the, An all-aluminum, race-proven V-8 defined the rare and wicked, The engine is what gives a muscle car its flamboyant personality. The 455 HO moniker was again carried over, this time as a near-exact repeat of the 1971 offering, the only changes were the carburetors (they used a conventional 750cuft/min (21m3/min) unit this year), and the head castings (casting #7F6). A mechanical system built by Rochester, it was similar in principle, but not identical, to the contemporary Chevrolet "fuelie". Installed position: 110-deg Duration at .050: 247/252-deg Here are my top six rationales for admiring the 1966 GP. Bolts or Parts: Lube or Sealer: Torque to: Main Caps. Around January 1966 Pontiac took the next step and began offering as a factory option the XS-code engine. Vacuum advance: Not usedEXHAUST Most likely prompted by its development of the Pontiac OHC six, the GM division built three different experimental SOHC 421 CID V8 engines in the early 1960s. 1962 - 389 SD Code 544127. V-8 (coded WG for stick or YH for auto) was the 2+2's base engine. It was rated 180hp (134kW) @ 4600rpm and 264lbft (358Nm) @ 2400rpm with a two-barrel carburetor, 200hp (149kW) @ 4600rpm and 278lbft (377Nm) @ 2800rpm with the four-barrel carburetor. RamAir 4 Motor Price $15500.00. This 356hp monster is backed by a 4-speed manual transmission, while the Pontiac also features power steering and power brakes. 301 4-barrel 'W72' or 'ESC' (170hp, 127kW) (with the 5th character of the VIN being a "W" for 1979-1980 and the 8th for 1981). Initial advance: 18-deg Rings: LPC (Liberty Performance Components) premium moly, standard tension Learn how Classified Ads works . The external dimensions of all their V8s, from 326455cuin (5.37.5L) were the same. The 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. The 2+2 option package arrived for 1965, giving the Catalina a performance persona and credentials to match.