chrisj6, I shouldn't have made the phone call but now that I've got these heads, I need to verify everything before I install them. I'm starting to get confused myself so you're not alone. According to the LS6 write up I still feel you would need the longer pushrods with your cam. It just doesn't make since that MTI tells me different. I'm sure there's someone here thats upgraded their LS1 with the LS6 components that can answer these questions a little better. I'm going by write uops and hear say. I'm fixing to know first hand once the heads are installed.