Re: zz4 crate engine
Have one in my camaro for almost eight years. improvements ive added over the years are: eldlebrock, EPS manifold (nice improvemnet), 600cfm holley Dp (stay away from big CFM carbs), thumper cam (if you want it to rock) along with big tube headers (needed for the "D" exhaust ports).
its never let me down.
69 X-44 base coupe, ZZ4, 16lb nodular flywheel, Center force DF clutch + PP, Holley 600DP, Hooker super comp 1 3/4 ceramics, 2.5" dual exhaust w/ X-pipe, flowmaster 40 series mufflers.