Hi i'm new to this forum and here is my question is I have a 1972 cutlass with a 455 in it. Here are some of the upgrades i have done to it Edelbrock performer intake manifold, TRW forged pistons, 770 Holley carb., Engle Cam, Hooker headers, HEI distributor and 8.5 MSD wires. My question is what gear should I use? Some say 3.42 or 3.73 note this is my weekend fun car and my new hobby not an everyday car.