Just picked up a 39 Ford with the original 16 in wide 5's on it. I'm currently in the middle of another project so the 39 will be on the back burner. Question is... I have 3 tires that won't hold any air so is there any modern type tires that will fit on these? I don't want to spend alot of money I just want to be able to push it around the shop when needed.