I need to remove the rear seat belts. The short headed bolts are almost impossible to get a socket or wrench on and they are rusty on the under side. How does anyone get them out. I know heat will help, but I have to get a grip on it. I thought of just drilling a hole and tapping the bolt (5/16-18) from under side, screwing a bolt in and use that to help turn as I heat. I do have the frame off so under side is very accessible. I want to do this before I prime and paint under side. Which is real soon (like next week).