Excellent advice all around, but especially "beware the ring of death". Wish I saw 5 years ago.
I had less rust than you, so thought bolting to frame and replacing the absolute minimum would be fine. Everyone is right that you should brace and measure carefully and cut minimally to keep the geometry. But also, check some of your starting measurements against other trucks too. if the cab has rust and some "history", your geometry could be out of whack to start. Diistortions might not show up anywhere else, but end up with bad news at door fit time.

Last edited by wurlitzer46; 06/12/2021 9:05 PM.

52 3100 project
54 3100 / 3112 ice cream truck, next project