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ENGINE HISTORY 429/429CJ/429SCJ/429 BOSS/460 During The Golden Age of Muscle, high-performance versions of 429SCJ (SUPER COBRA JET) 429/460 engines flashed on the scene like a firefly. The glow Now, we’re talking about an engine you can mod i fy for serious was brief—from 1969 to 1971. The memory lingers on. All of those competition. The 429SCJ has 4-bolt main caps (#2, #3 and #4 cubic inches! Never again available directly from the factory ready journals), mechanical cam, adjustable non-positive stop rocker arm for competition. Luckily, engines and pieces are still around. There are studs, stamped rocker arms and push rod guide plates. The pistons several ways to go, depending on the performance level you want, are forged aluminum and con rod bolt seats are spot faced. As with be it simply a Bracket Drag Racer, or something more potent, like an the CJ, production end ed in 1971. offshore power boat, big torquing engine for truck pulls or a Pro Stock drag machine. Here’s a brief description of production engines to give 429 BOSS you an idea of part interchangeability and general per for mance level. This is an all-out competition design with aluminum heads and hemi combustion chambers (technically, they’re “crescent- 429/460 shaped”). The first few hundred in 1969 for NASCAR® competition The 429 “Thunder Jet” was introduced in 1968. It’s your basic were called “S” engines; the later street version is a “T” engine. “T” passenger car “wedge” engine design with hydraulic cam, 2-bolt engine con rods are spot faced for a .375" bolt and hex nut. “S” main caps and either 2V or 4V carburetor. Cast iron “rail” rocker arms engine con rods are beefier, 0.056" shorter, have wider bearing are mounted on non-adjustable, positive stop studs (1968-1972). journals and use a .5" bolt with 12-point nut. 1973 and later 429/460 engines use ped es tal-mount rocker arms as described for 351C en gines on pages 81-82. The 460 is a stroked version of the 429. With mod i fi ca tions, these engines can be used for most com pe ti tion, except offshore boats or with a su per charg er. 429CJ (COBRA JET) Take a base 429, then add a hotter hydraulic cam, larger CFM carburetor, heads with bigger ports and valves, plus a few other items and you have a 429CJ. 1970 engines had 2-bolt mains; 1971 models 4-bolts. Engines built before 11/1/1969 use an ad just able, non-positive stop rocker arm stud, so a me chan i cal cam is easily installed. For important information about the proper usage of performance parts, please see page 14. 92 Techline (800) FORD788 See pages 286-292 for important safety, emissions and warranty information.


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