Dan53 wrote:
Of course, you'll need to replace the torn out mounts before you start.  You could just use a regular nut and bolt, but this is the "easy" way and will also require someone else there to help you.

And you'll need some big washers for the inside. But I agree this is not the hot setup. Plus it doesn't work where the inside is inaccessible, such as the lower bolts closest to the doors.You should lube and unbolt the original square compression nut from the damaged fender and have it welded into the body when the rest of the welding is done.