My 470" tall deck went 9.69 at 139 in a 3100lb Duster with iron heads. It don't take a ton of power to run that in a typical A body racecar, 650ish will do it and I think they can live long happy lives at that level. Provided that the cylinders have some thickness or they have a tall fill.

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"