[Katrina/10]

The original wheels should be Firestone split wheels if they are still on it. They look like regular wheels on the outside, but split in the middle. Most people consider them unsafe. If you just want to change wheels, 6 lug military lock ring wheels will fit, and you can have tires mounted by truck shops. For a true one piece wheel, 6 lug 22.5s are out there but hard to find. You can mount modern radial tires on these, but that would cost you a bit.