I like your older home built Hot Rod truck .
Especially the paint color, in my old age I have decided I like red .
Clearly it wasn't built by any professional but that doesn't mean it won't be a good riding handling and safe rig, once you go through it .
Some details like the reversed spark plugs wires, choke pull wire and so on show the kind of ingenuity we used on the farm to make old clunkers run again when I were a lad in the 1960's .
Don't sweat the cab swap nor the bed, I see no rust holes and that's the important thing .
Please keep us posted as you go along .