The Stovebolt Site Forums The Shop Area Paint and Body Shop 65 Chevy front cab support bolt problem

I'm assuming this is the bolt that goes through the rubber body mount. I just did mine and had the same problem. There is a metal tube the bolt goes through ( inside the rubber) and the bolt is likely rusted into the tube making it a larger diameter than the hole in the floor. This tube is also probably stuck solid into the rubber mount. I used an impact wrench (alternately tightening then loosening) to break it free. I also was replacing the floor pans so air chiseled (carefully)the spot welds from the large "washer" the bolt drops through and then had to cut the bolt off after I got it out so I could re-use the washer.