Compression ?????????

AdamR said

It depends on the entire combo, Gearing trans, car weight, Cam, heads, altitude.

A safe bet is 9.5:1 with iron heads and 10.5:1 with aluminum.

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Thanks alot Guys Im new and HAPPY to be a mopar owner ,i just dont know much about building a SB mopar.
Im planning to keep it 4spd gears 3.91 stock wt.and i have been reading about cams so far im planning a voodoo cam, AIR GAP intake,750 holley carb so far