Is there anyway to fix this other than replacing them?

http://www.fatboyspigpen.com/images/chevelle/Front%20Inner%20Fender%20Right-1.JPG
http://www.fatboyspigpen.com/images/chevelle/Front%20Inner%20Fender%20Right-2.JPG
http://www.fatboyspigpen.com/images/chevelle/Front%20Inner%20Fender%20Right-3.JPG

If you can afford it I would replace them.

That looks like a picture of the surface of the MOON! Are those plastic or metal inner fenders? If its the metal ones how is the section were the battery tray area is? I need that section for a repair,hehe

Those are plastic, and I don't think there is any adhesive that will work for any longer period of time. I have two cracks in one of my inner fenders, and was thinking about finding a way to weld the plastic like they do with materials like roof covering, vinyl carpet etc. I'm pretty sure the fender is toast, but I'm going to try it anyway just for fun. Heat gun with a fine tip on it, maybe?

Before I gave up the ghost, I contemplated repairing mine. I was thinking of fiberglassing patching them from behind the cracks, use some body filler on the surface, and after fine sanding the surface, I would have given them a coat of SEM black spray dye. But then I thought, way too much work. I bought a apair of aftermarket metal inners, had them powdercoated in semi black, and called it a day. The after market inners are thinner than OEM, but they look pretty good installed. And the best thing was they actually fitted the fender. But I really like the angular shapes of plastic inners. By the way, OPGs plastic inners are molded from OEM metal inners - go figure.

If you are really intent on fixing them, try 3M 8115 panel bond adhesive.
It is good for plastics also, I've used it on alot of different types of plastics.
Works great for steering whell repair.
It has a 90 min work time and a long, overnight, dry time so you can't be in any hurry. Surface prep is important, read the instructions.
A plastic welder from Seelye or Urethane Supply Co. can also be used if you
get the right rod. A heat gun probably isn't hot enough. The plastic that was used may be a blend of different types so it may be difficult to get a rod tha t matches exactly. Usually the older plastic can be matched.

For the broken bolt holes, fill them in completely for strength then carefully
drill them back out. A Unibit works well because it won't grab like a drill bit and break the plastic.

Not worth fixing. You can fix the plastic but it's over 30 years old and will break some where else. Replacements are chip enough and fit well.

Agreed just throw them away get new ones.

I had the same problem with my canada built chevelle. If you try to fix one end it will brake on the other end. Take my word & up grade with metal one not repro plastic. Good Luck!!