[56hotrodred]

I am doing a 56 body on an 80 frame. The measurements that I looked at first was the brake drum backing plate to brake drum backing plate for seeing how the wheels would sit within the wheel wells, then the actual frame width to see how the body especially the cab will sit. The last one I looked at was overall frame length.

Other factors such as wheel choice, especially rim offset will affect how it all tucks underneath. If you are going 4x4 route then it is easier as you do not have to worry about the wheels tucking under the fenders.

With mine brake drum to brake drum was real close, frame width was exactly the same but the overall frame was longer. This meant that I could just take the cab mounts off the 56 frame and bolt/weld them to the 80 frame and fit everything else to the cab. With mine and other similar swaps I have seen we end up with a 4 or 5 inch gap between the cab and box. Sounds like yours will be much closer which is a good thing.

The most fabrication I had was with the front radiator support but I have worked past that one.

I did not want to be cutting any frames up, my 56 frame was little bent up and the 56 was also not all together thus the resto-mod route.

Hope this helps a bit.

56hotrodred