Found an unwelcome sight when taking the last parts off of the frame. The rear spring mount (cast iron part riveted to the frame) for the rear right wheel is broken to the point that the frame can be lifted right off of the shackle pin. Good thing the previous owner didn't take it over any large bumps...

My question is, are these mounts interchangeable with the 1-ton or 3/4 ton? I saw that the 1-ton has a 2.5" spring width vs. 2" for the smaller trucks.