Stock compression is very low,KB 107 pistons are a very nice choice. Mild cam 230-240 @.050 approx .500 lift,headers,LD340 or RPM airgap manifold,holley carb 650-750 DP,3500 or more converter,4.10ish gearing and it's just no big deal to run high 11's to low12's in an Abody. I'll assume the heads have had 2.02 intake valves installed? They left the factory with 1.88 intake valves.Find someone good to do a quality valve job and bowl porting. In a truck at 3800lbs you could possibly run high 12's.