im leaning towards vortec heads off of newer chevrolet. i have been hearing lots of good stuff about them. seems as though i can get a set for around 400 bucks. is there anything i need to look for before purchasing a set. they say i can get 50 hp just by installing those heads. i really wanna get some lift though. i know the cam is the heart of the engine and i wanna beef this thing up. i dont want the normal ol c10