Thanks Danny, I have a Motors Manual and it doesn't give any information on installing the flywheel. You are correct in that the crank is not threaded and the bolts just slide through the holes. As I mentioned the bolts are already installed and seem to be bumping against the flywheel when I try to bring it up into the bellhousing. I have a 1941 Buick Shop Manual coming and it should be here early next week. If you happen to find your manual and can get me a photo that would be great! Thanks, bingart.