I've pretty much stayed out of the hypo-hippo-hypothermo- of this thread... you get the idea. However, that is a lot of work to get around 220 at .450. A lot of work, and as he mentioned, a lot of material had already been taken out. I understand their project and why they are doing it, but in no wise is this head the recommended head for anyone looking for flow at .450-.500 lift of them flow numbers. For all practical purposes, this is about the most expensive way to get there. But this build is for fun. Let them continue ... :)