Ive been looking into heads. I see that the trick flow heads are cheaper, what would be the best model of tf's for a stock engine, h/c/i, and what cam is good with those heads and a trickflow intake(street heat)? Also, whats up with you gotta use "indexed rockers" and "longer pushrods" with em///. do you ahve to do that with afr's? thanks!! im tryin to decide!