I believe you will find those rims from the '75 will fit just fine except for the front offset as was just pointed out. I have a 1" adaptor on the front of my '50 but could have gotten away with about a 1/2". One of the best ideas that I've heard but haven't tried yet is to use spacers to move the steering knuckles inward to clear the rim. Then you wouldn't need a spacer or adaptor. These would be a snap to make for anyone with access to a small lathe.
The rears clear just fine and look great. The reproduction hubcaps for the 3/4 ton trucks will not clear the free floating hub but the original hubcaps will.
$50 for the set is a steal.
DG


Denny G
Sandwich, IL