I have a '69 440 HP block, balanced blue printed,.040 over, 6 pak rods, flat top pistons, 509 cam, Edelbrock performer intake, guessing 1-3/4" headers from "Dougs", Chrysler elec ignition, 750 holly dbl clunker.....steel crank. ported/polished steel 906 heads .....anyway, what is the best...