I live in Florida where in the seventies you could ride on the beach. The salt wrecked havoc on the lower fender bolts and I fought a many of them. If you can get the fender off by removing the rest of the bolts then you can repair the problem. Another approach remove as much of the bolt as you can with a grinder and then pry the lower part of the fender down and over what's left of the bolt. Once you get it out use a block of wood to hold it out so you can get on a creeper and work at removing what is left of the bolt. You may have to drill it out and run a tap up in the nut that is welded in the rocker panel. If the nut breaks out then you will have to weld a new nut in its place. To help you pop the fender down and over the bolt remove the bolts from the top of the fender and remove any shims that are under them. There is also a few bolts just inside the back part of the fender and in the door jam in front of the door, you will need to remove them too. Open the door and look inside the door jam toward the fender and you will see them. You will also have to remove the inner fender bolts. There is one about 8 inches in behind the wheel that screws up into the fire wall or you could just remove the ones that are just under the fender well lip. This should give you enough leeway to pull the fender out and down to get at the problem bolt. But if it was me I would just remove all of the bolts and take the whole fender off. Once you get the rest of them out along with all of the shims the fender will drop down and come off the bolt. You must be somewhat young. I love it when I hear about the younger guys fighting what I fought for living many many years ago. The fenders on those old GM cars bolted on a lot different then the unitized body cars that are in production today. One more note: When you put the bolts back in be sure and put some sort of never seize compound on them. Have fun and good luck.
Last edited by Chris Kemp; 11-08-2010 at 08:35 PM.