Welcome aboard Aaron!
I'll add a few bits more. Your problem is a common one there been more than a few posts on the subject. If you haven't already the outer two post that the exhaust hangs on can be replace with studs or bolts. You can put a pair of vise grips on them and unscrew them. I'm going to assume you have the long tube headers. An option is to replace the tube headers with Stovebolts cast headers they seem to seal better from the get go. The tube headers have several problems. Even though most have 3/8 flange they seem to warp. Second the two tube headers that I have, have both had the tubes welded to the flange on the mounts to the head, so the header has to be mounted perfectly to the gasket. Depending on much bead they left there may not be enough thickness to get to get a good seal all away around. You can even out the bead and hope they got good penetration, too much and you lose the weld. Some have reported brazing around the outside of the tube. Another remedy has been to double gasket using the heat resistant RTV between the gasket. There's more coming you'll find there's lots of good opinions here. 8^]
Larry
