Realistically; you have to match your rear gear to the camshaft and the heads. If you have a pretty reasonable budget, Id do the following
Ditch the TH350; run a built TH200-4r and some 4.10s in the axle.
Learn to tune your quadrajet
Add a 100 shot of Nitrous; start your learning curve with a 50-shot and work your way up. Make sure you use race gas at the track when you're on the bottle
Eventually get rid of the iron heads for performance aluminum heads.
Ditch the rear seat and anything else that adds weight.
Last edited by AutoGear; 12-07-2012 at 08:23 AM.