1971 Buick 455 GS F/SA G/SA Build

[HP HUNTER]

Originally Posted by goinbroke2

Can't wait, I can imagine some must be concerned with you showing "secrets" lol!

Not sure about that. Heres the flow numbers on my stock 661 casting heads.

Intake flowed @ 28 inches 4.350 bore SF 600 bench

.200 120
.300 177
.400 207

Exhaust flowed @ 28 inches 4.350 bore SF 600 bench no pipe

.200 95
.300 124
.400 143
.460 149

As you can see I've got a real power maker here.............