Welcome to the Stove bolt
I agree with all of the above information.
As for you wheels, how many lugs do you have? If 6 -lug, they will be Budd wheels and you should be able to get replacement 22.5" tubeless wheels and tires. They came on lots of trucks and buses in the 60's and 70's. The RH-5's have been known to blow apart without warning, so take John's advise and replace them before putting the truck back in service. When you are ready to replace them, just let the air out and then they are safe to work around.
Mike B
