oh im not sold on those or any other one, thats why im here asking for help..lol..all i know about those heads is that apparently they had one heck of a sale that i missed out on and i believe remember seeing that you are better off buying them bare and using better hardware..Like i said, i would LOVE the trickflows, but not sure yet if i can, so thats why im asking about all the rest, speedmaster, promaxx, edelbrock, 440 source, and whatever else is out there..and i also watch the for sale section in case something comes up there, but i need to know more before i do anything, like do i need to stick with open chambers or could i go with the 78 cc closed chambers with my pistons.