Doc, would it be possible to remove the stud and replace with a bolt? Not seeing your problem I'm just thinking out loud.
Dr, is it possible to remove the stud and replace it with a bolt? Not being able to see your situation I'm just thinking out loud.
As far as putting a small dimple in the header to gain more room is possible. I once had the same problem on a race car and I ever so lightly put a small dimple with a hammer and it worked. A small dimple should not cause any exhaust flow issues.
With just a wee bit of persistence and not giving up you will get it done it may need a few attempts approaching from different angles but there will be a way to do it just hang in there
The more trouble the job is the greater the feeling of satisfaction is when you are finished
Brian
I just learned something new at your expense. I know my dad who was a mechanic all his life always found a way in a tough situation. I've seen bent wrenches and ground side wall on sockets in his tool box just to make it fit. Good luck.
Make sure the rest of your exhaust is loose enough that you have enough wiggle room to get at that nut. The bracket above the trans. is the one that gives the most slack.