Hmmm... i see. I guess I'll just have to breakdown and find a set of E7TEs just to get them along side all my earlier stuff to compare 1 on 1. I'm like you, I run what I have lying around or what I can scrounge up. Every now and again, I'll pony up some skin for certain parts or for certain applications. Jim, the guy who does my machining only charges $100-150 extra (with a valve job) to port any 289 heads I bring him. For larger valves, I just buy the larger valves and the seatwork cost is the same as if a regualr valve job is done and any un-shoruding is done with the portwork. I think I haveon the average $500 into a set of these re-worked 289 heads and they really flow pretty good. I have some flow numbers if anyone is interested. Unaffortunately any head not having 3/8" studs, there is more costs involved because you'd really want to loose the 5/16" studs that most 69-up SBF heads had.