ok heres the deal my car isnt done yet but heres my combo.... 83 gt, 89 roller motor with stock 4v intake for the 83, underdrives, 2 1/4 inch duals no cats, flowmasters probably 40 series, stock headers, deleted smog and ps pump, removed rear seat and all polution junk, 600 holley (non polution), electric fan, 3:08 rear gears, t-5, centerforce stage 2 clutch... oh and car is factory non a/c car what do you think on a guess for the 1/4 and do i stand a chance of beating a 03 v6 with cold air, underdrives, duals and a 5 speed? interested in hearing your predictions