International Trucks. Who's got um
I had a 53. I installed a Ford Mustang II front end and a 302, C4 trans with an 8.8 diff. That gave me rear discs. The front end was extremely close to the right width! I had to make one zip disc slice through the crossmember and then weld it back together. I used all the electrical and brake system from the Ford as well. It was an easy build.
Anyway, it's gone now but driven regularly by the new owner shown below.