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1970 Ford Torino with 429 Super Cobra Jet, showing shaker scoop and intake. The Super Cobra Jet (429SCJ) was fitted with a Holley 780 cu ft/min (22 m 3 /min) Vac-Secondaries square-bore 4-bbl carburetor, larger mechanical camshaft, a four-bolt main block, forged pistons, single valve relief, [4] forged rods, and Brinell tested cast iron crankshaft.
The top option was the 429 SCJ (Super Cobra Jet), rated at 375 hp (280 kW), and was part of the "Drag Pack" option. Selecting the "Drag Pack" option turned a 429 CJ into a 429 SCJ. The drag pack required either the 3.91:1 or the 4.30:1 axle ratio, and included a 4-bolt main engine block, forged pistons, 780 CFM Holley carburetor, engine oil ...
The Mustang's engine compartment was not wide enough to accommodate the massive Boss 429 engine, so Ford contracted with Kar Kraft of Dearborn, Michigan, to modify 4-speed Cobra Jet Mustangs to accept it. Kar Kraft was a Ford exclusive experimental facility that functioned as Vehicle Engineering for Ford's Special Vehicles.
The 429 Cobra Jet with Ram Air was the standard engine for the Cyclone Spoiler, with the 429 Super Cobra Jet with Drag Pak and Super Drag Pak optional. The Super Cobra Jet upgraded the block to four main bolts and provided a mechanical flat-tappet camshaft, and the carburetor was changed from a 720 cfm Rochester QuadraJet to a 780 cfm Holley.
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.
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.
This mighty electric Mustang prototype looks to beat its 1400-hp predecessor's quarter-mile time of 8.128 seconds at 171.97 mph. 1800-HP Ford Mustang Super Cobra Jet 1800 Hunts NHRA World Records ...
The Boss 302 and Boss 429 were discontinued, with both Boss engines and the 428 Cobra Jet replaced by a 370 hp 429 Cobra Jet V8 (with or without Ram Air). [33] For 1972, Ford adopted SAE net horsepower ratings, leading to a numerical decrease in advertised engine output.