hey straight shooter i have a 421 18degree what size valve would you recommend ,i have 2.180s now and they go to 377
@800lift 250ex @800. would i see i difference with a 2.25 and shrink the exh to 1.550 from 1.600"
joe do you now what the angles are on the stator and how many blades if not send me the pt
3 on the shell ineed 7200 but I have a big inch sbc 420 inch pk tq is 6800 pk hp is 8,000.
727 678 6066 john
jimmy I don't what yu make for torq but I make 588 @6800 and 800 at 8000 I need 7200 but they were sayin I need a 40-13 what ever that means maybe you can shed some light for me on that its a 421 ci 18degree 3.875 stroke..