Something, something, you can't use blood inleue of RTV

On the plus side the tube and adapter caught the header bung in such a way that I was able to smother it in Xtreme temp JB weld to make a new bung. If this doesn’t work... Excuse for 7.3 with aftermarket headers?

The original problem in question:

Chrome boyo doesn't want to thread into the header bung, nor will the old one go back in.