So I should use Edelbrock 600's on my 2x4 small port intake with my modified 1147 heads and Isky .488lift Hydr 10:1 CP pistons, 6.135 rods, 454 4"stroke crankshaft, modified valve covers, (What distributor do you suggest I use)?, o and will the 409/425hp exhaust factory headers fit my 1147 heads