Well, you asked...BUT I DON'T RECOMMEND IT!!
I purchased my 1947 Diamond T about 10 years ago. It had 22K original miles on it and came with the original tires. The 8.25 x 20 Firestone bias tires had only minimal tread left. They were checked, but the truck had obviously been shedded most of it's life.
Those tires seemed fine, but I could only imagine tearing up my fenders when one let go, so I found some new Firestones. I gave away 5 of the tires to someone who needed them to move a truck around a property. I kept one as a garage decoration.
Kent