STA has 17.5" LT tires if you stay with that size. I don't know the cost. I run a set of their 16" tires on a '47 Power Wagon and no problems. If you go with a newer size, I would suggest 16" or 17" as tires are commonly available. 16" wheels should be available used with 8x6.5" bolt pattern from a later dodge (up to about mid 90's when switched to metric sizes). Or available new in some classic styles. Check Summit, put in your bolt pattern and you can see quite a few wheel options. I run US Wheel steelies on a brand F classic PU and like them.

These wheels are usually "lug centric" on a 3/4 ton PU but need to make sure the center register clears the hubs.


http://www.stausaonline.com/tires/sta-super-traxion/