Wow, that is alot of work accomplished! I really enjoy seeing projects progress.
Too bad about the body problems. Ah, it's just money, right.
Here is a link to a page about the headers that I am using on my K20 with a 454. You may have seen this info before, but I wasn't sure.
http://www.myoldtruck.com/modules.ph...&pid=12&page=2