Stock eliminator build, while trick, is still very limited head and induction wise, the two areas where not having such limits are helpful.
I am pretty positive what I want to do isn't that hard. 550 or so isn't that much steam with good heads and combination, even at 340 something inches. I don't want to spin this thing much past 7k either. Shouldn't have to either.

Maybe some skipped my reference couple of posts up to that 340/w9 build that broke 600 horse@ 7000 rpm. Dyno's are dyno's and would love to see what that motor ran in a car..... Buts the heads were supposedly barely touched and only went 280.
The heads I would use I think would likely be just as good, if not better.