BFG Radial T/A all season street tires. A 750 DP may ad a few HP but it won't make a huge differnce. I have had 600, 670, 725 and 750 cfm carbs on my engine and there is very little difference by the butt dyno and none between the 670, 725 and 750 carbs, I settled on the 670 because it has a very noticable improvement in driveability over the 725 and 750 without giving up anything on the top end.
