Im in Bonners Ferry. The frame is a 64 1/2 ton gmc. The only difference between 1/2 and 3/4 is the bolt on front suspension parts and the rear leaf packs. All of these parts are bolt on and you can swap your parts onto the frame. The main part of the frame and crossmembers are the same. Any 63-66 1/2 or 3/4 ton frame will work under your truck. A chevy frame will also work but the rear suspension is different and not worth trying to swap out. But you could use it and just keep the chevy rear suspension. You may be able to find a truck or frame a little closer to you with this info. If not my contact info is below. fill free to call or email if you have any other questions.
Lyle
