Ultimute EQ headed racemotor? Lets build it!

You are really limited by the available port cross section of those heads. Saying that, for a street motor, I've used the Indy LAX head, 424ci/360, single 4-bbl, single plane Edelbrock Victor, solid roller (258/260 .638/.645 110 on 106), 91 octane, 11:1, 625 HP @ 6,200 rpm. So I know that is possible with no dry sumps, vacuum pumps, not even piston coatings. I did spend the bucks for a crank trigger and we modified the LAX head to run Chevy stud rockers.