Chevy high performance 621 11" style aluminum bell housing that was issued on all of Chevrolets Super Cars with big block 396 / 427 / 454 Yenko / Copo / ZL1 and also small block like 302 / 350 or 400 with 11" clutch such as the Z28 / Yenko / Deuce models.
Fits most vehicles 1964-81 except for 1962-67 Nova . Fits 1964-1988 Chevrolet Chevelle, Malibu, Monte Carlo ,Fits 1959-1987 Chevy El Camino ,1959-1988 Chevy Impala, Caprice, Bel Air, Biscayne, Brookwood, Kingswood, Nomad, Sedan Delivery , Fits 1963-1981 Chevy Corvette , Fits1967-1981 Chevy Camaro , Fits 1968-1974 Chevy II, Nova With Manual Transmissions & 168 tooth Flywheel
The transmission hole measures 4 5/8" and the GM Part # is 3899621. Works with GM transmissions with a 4.675" O.D. Bearing Retainer Clears 168 tooth 14" Flywheels with factory 11" clutch discs 1/2"-13 tapped hole for z-bar manual clutch linkage, if needed.
This bellhousing for your 1968-1979 Nova is CNC machined and heat treated to T6 specifications, this bellhousing features extensive reinforced webbing, clutch fork opening, threaded pivot bolt hole. Accepts Saginaw, Muncie, Borg-Warner and Tremec TKO/T56 transmissions with a 4-5/8" pilot bore. Fits up to 11" clutch on a 168 tooth flywheel. These housings are produced from the GM blueprints. Faces are trued and surfaced. All dimensions are machined to required tolerances.
Vehicle Fitment:
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