Depends what you wanna do, and how serious the heads are. For a stock car, yeah, $1500 on a head probably isn't your best bang/buck. If you want to make 400hp, I bet you a nice CNC ported head will be pretty irreplacable! $1500 isn't too out there, as far as heads go. V8 guys pay $2800 for a set of good aluminum heads, and those are old pushrod stuff that aren't as complicated as 4V heads.