Note that it was not thought to be possible to order an SCJ engine by itself -- the only way to get your hands on an SCJ in a Mustang was to order the optional 3.91:1 or 4.30:1 rear end gear ratios. Yep, I'm a hack! All this was none too soon. I want to register an account for free right now! Bore and stroke was 4.0 X 3.5. The cars ran very well and won in the Super Stock category that year. See if you can determine if these motors you are looking at are CJ's. Because of this, '69 Mustang GTs are collectors' favorites. The heads ID themselves. They have released new Cobra Jets every two years, with 2022 being the first exception so far. Ky, Cobra Make, Engine: CSX4761, KCR Shelby Alloy 496,760hp, My 427 racer buddy gave me a nos set of c6ae lemans rods,he strongly cautioned me to replace all the bolts with arp ,even though they have never been torqued,he told me in the 70's they went thru a rash of windowing new motors and was told by holman moody that of the ford rod bolts at least 25 percent were fualty out of the box,that would ruin your day to say the least,,huh ? Ford execs got the word. Comparison of Major 428 Engine Components, 1968 428 Cobra Jet Drag Strip Modifications, 428 CJ Mustangs at the 1968 NHRA Winternationals, Classic Mustang Warranty Plate/Certification Label Decoder, Cast iron, similar to PI with revised carburetor bore risers, relocated carburetor pad, and radiused riser to upper and lower logs to improve fuel/air distribution, Production 390 GT cast iron light car manifolds, Redesigned high flow, low restriction unique to the 428 CJ, Redesigned dual inlet with hot/cold start-up system. Sadly, Ford discontinued the 429 Cobra Jet Mustang and other CJ-powered cars halfway through 1971. (REGISTERED USERS DO NOT SEE THIS POST/AD! Cobra Jet Crankshaft (engineering number detail) The back of the CJ block should have a "C" cast or welded into the back of it. Component Identification | Mustang 428 Cobra Jet Registry While the 1970 Ford Mustang Mach 1 came in eighth place on this list, it came in 21st place in the fastest muscle cars of 1970 rankings. Yet, while they were considered big blocks, the first generation of the Ford FE never had displacements of larger than 400 cid. The 428 had a bore of 4.13" and a stroke of 3.98" and was produced from 1966 to 1970. Restyled in 1970, the Mustang returned to single headlights that moved inside of the grille. I spoke to Rob Celedon the other day and his SCJ car has the same stamp on the block. It was a good-looking car featuring wide availability in its engine selection. (REGISTERED USERS DO NOT SEE THIS POST/AD! Crankshaft | Mustang 428 Cobra Jet Registry I won Winter Nationals at Beeline Dragway in DStock Class at 13:05 118 mph in 1970 with my 428 CJ Mach. The Cobra Jet 428 motors in Mustangs used heads from the 427, plus other enhancements to really put some hair on their chest.
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