A couple weeks ago I stumbed on three old trucks all mounted on 1-ton frames. Two were Dodge's with Cummins motors and the third was a gas powered Ford.
A Diamond Reo, a Diamond T and I've forgotten what the third was. I took pictures but since none of them were made by GM or even using GM parts I haven't shared them here.
One guy working in a shop behind his house. They sure were cool!