/6 questions

That would be good, how many leaves and how wide and thick are the leaves? Definitely going to have to stay with the large platform, your way past D300, F350, C30 when you get into 1-1/2 ton.

I had heard about the IH bus swap. I'm not necessarily trying to keep it all IH
what ever is affordable and will work. I'm no Mr . deep pockets so $ is a key. It will probably be more a custom then anything. Cab has some rust issues, guages are shot, I will change to 12V, needs glass . I can still get glass but $$$$.Some of the chrome will interchange with Scout, Travellal etc 50's thru 70's.