I agree the iron heads are a limitation. The goal was to run a factory ram air hood and draw fresh air in. Iron heads ported from Butler, i think they should flow 250 cfm. I may be able to run another intake, possibly a performer rpm by thinning the seal an inch between the hood and carb plate. My target et was 11:99 or less. (With no nitrous) I figured it would take about 600 hp to reliably do 11:99 or less ET. Do I sound way off some where in my thought process?
Save your money you don't need all that to run those numbers. I just ran 11.53 with my pump gas 455 with 220 cm #16 D-ports today in 94 degree weather. This is a street car that gets driven everywhere.
