I think these heads are perfect on a 470 inch shortblock. The peak power hits at 6500 rpm which seems like a good place for a budget engine. The valvetrain should be stable at 6500 rpm with almost any lobe design and you should be able to go down the track with a reasonable gear in the rear end with 6500 rpm peak power.

I designed the engine to put a 3200 lb Duster into the high 9's with a 4.56 rear gear. I don't know if I'll put the engine into the Duster or not but it seems to me that it would work just fine. Should go thru the lights at 6700 to 6800 rpm depending on converter slip and it making enough power to pull it at that speed.

If you put these heads on a smaller engine you would have to run more gear while a bigger motor would take less gear.