I agree with some other guys that your money is better spent on more cam and converter. My 408 with Curtis Boggs ported Edelbrocks, 11.4-1, 260/264 @ .050, .633/.628" lift flat solid, 727, 9.5" converter that flashed 5200, 4.10 gears and a 28" tire went 6.58 in the 1/8 at 3240# on pump 93. It ran 6.70 in street trim.