CLUTCH/TRANS:
. A-833 four speed, aluminum case, narrow ratio (trans-am) gears.
. Hurst Competition Plus shifter
. McLeod dual plate aluminum clutch, 8 lb flywheel
 

DIFF:
. 8 3/4, (489 case) narrowed 1/2 in. per side, 3.55, 3.91, or 4.30 (depending on track) with Sure Grip.
. Mopar Performance snubber
. Moser modified big bolt axles.