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The 428 Cobra Jet was a performance version of the 428 FE. Launched in April 1968, it was built on a regular production line using a variety of cylinder heads [30] combined with a 735 CFM Holley four-barrel carburetor. The Cobra Jet used heavier connecting rods with a 13/32 rod bolt and a nodular iron crankshaft casting #1UB.
351 Cobra Jet; 302 Windsor V8; 351 Windsor V8; 400 Cleveland Ford 335 engine#400 V8 aka 400FMX certain 1973 casting numbers D1AE and D3AE, mated to the FMX transmission) 3.8/3.9/4.2L Canadian Essex 90° V6 (RWD only) 240 I6; 300 4.9 I6; 4.6L Modular V8 (first two casting runs, numbers F1AE and F2VE) 302 5.0L Windsor V8; 351 5.8L Windsor V8
The newly introduced GT-E was introduced with a 427 cu in (7.0 L) V8, rated at 390 hp (291 kW; 395 PS). [9] [10] As a mid-year option, a 428 Cobra Jet Ram Air was introduced on April 1, 1968, [11] rated at 335 hp (250 kW; 340 PS). The 428 Cobra Jet engine replaced the 427 in the GT-E.
The 390 four-barrel was supplanted mid-year as the top performance engine by the 428 cu in (7.0 L) Cobra Jet, developing 335 bhp (250 kW). There was also a 428 cu in (7.0 L) Super Cobra Jet. For 1969, the Fairlane 500 , Ranchero, and Torino GT/GTA were also offered with the new 351W CID with a two-barrel producing 250 HP and only in the Torino ...
The first was the 429 Thunder Jet, the standard engine for the Cobra, rated at 360 hp (270 kW). Next was the 429 CJ (Cobra Jet), rated at 370 hp (276 kW), which included a 2-bolt main block, hydraulic lifters, a 700 CFM Holley or 715 CFM Rochester Quadrajet carburetor, and was available with or without Ram Air. The top option was the 429 SCJ ...
425–435 hp (317–324 kW) The L72 was a 427 cu in (7.0 L) 90° overhead valve V8 big-block engine produced by Chevrolet between 1966 and 1969. Initially rated at 450 horsepower, the rating dropped to 425 hp (317 kW) shortly after its release (although there was no change in power).
The 428 cu in (7.0 L) Cobra Jet engine continued unchanged in the 1969 and 1970 model years and continued to be advertised at 335 hp (250 kW; 340 PS). If a V or W axle was ordered (3.90 or 4.30 locking ratio) on any Cobra Jet Mustang, engine improvements were added to make it more reliable on the strip.
1969 Mercury Cyclone Cobra Jet. Mercury also added a new model to the Cyclone line: the Cobra Jet (CJ). The Cobra Jet's engine was a 428 cu in (7,014 cc) which generated 335 hp (250 kW). The engine had a Ram Air option, a 735 CFM Holley four-barrel carburetor [3] although the option showed no quoted difference in horsepower rating.