big block pro comp heads

bOb hit the nail on the head you need to change the rear gear to around a 4.30. You will run out of gear very quick with those 5.17's specialy with that weight. Also I dont think those heads will make power past 6500RMP and I think the cam will fizzle even earlier. Those gears and tires are going to want to spin in the 7300 to 7600 in the trap, may even be higher with the verter slip. If you keep those gear I think you will struggle with high 10s and low MPH (117 to 122 ish).