I have a stock bore 340 at the machine shop going .030 over and have a Scat forged 416 kit going in. I'll use my Trick Flow heads and intake and the 850 carb. I have 4:56 gears now and also have 3:91's if the 4:56 are too steep for 1/4 mile. The build will end up at 10.4/1 so should be fine on...