Think an E-body BB Car sucks, try a 505 C.I. stroker RB engine in an A-Body, with 2" primaries...
Oh and BTW: There's No "Easy button" here..No manifold will ever hold a candle to a set of headers. (Yes, even the coveted "HP" ones suck)..
By the good TTI headers if you aren't into any kind of maint. and be done...OR, I don't know why this hasn't been done more often here, but I cut the flange OFF the headers as soon as they come out the box and weld on a "bubble" flange, or run a band clamp..This TOTALLY stops the dreaded flange gasket blow out..
"70 cuda, 440, KB pistons, 10.5:1 compression, edlebrock heads,RacerBrown cam, mopar M1 intake,750 Mighty Demon, Keisler 5-Speed Tremec 11.67 116mph" What kinda headers is on this thing?