Don't get the hot rod temptation to get nice wide tires. If you have original wheels, get a nice conservative size comparable to the original tires on the truck. Old school wheels can handle tubeless radials if they clean and rustfree, but the rims are beveled unlike modern rims. So a wide modern tire may slip off the old style rim at high cornering loads and create a major issue. Diamondback and Coker are the ones to look at for vintage wide white radials. I lean to the Diamondbacks because they are USA made originals, but you have to do your own homework.
Oh and don't get those big 3 and 4 inch whitewalls, they look crappy. A nice 2-2 1/2 " wide ww is really nice. JMO.
