Thanks Pennyman1. I will be familiar with every bit of my truck soon. Thats a good thing. I expect much better performance out of it when I finally get it all back together. That old head was in such poor shape and my linkage for the secondary butterfly was unhooked due to a tang that didnt hold the nut on the end. I was thinking about popping the exhaust manifold apart to check the cat and see if it's fallen apart. Does it increase flow to pull that out? I would like to put a header on it eventually, but workin with what I got now.