I finally got some headers that fit. I have a 351w swapped in with butchs rod shop engine mounts. I bought the cheapest black 351w headers on eBay, they were 84.99$. They fit perfectly, with good room on all sides and easily clear the linkage for my power rack.
Any questions and I could send a link.
Pics and ordering details please.
Item #: 310310000335
This is the item number for the headers. I'll take pictures when I'm back in the garage.