[bigblock73]

Ok, just got back from the shop...no pics, but i will try to explain.

1 wheel has a center opening that is not a perfect circle, but more "squared off" for a lack of a better term, and the holes where the center caps screw to are raised. This wheel fits all four corners of the truck...and the wheel looks factory, un modified.

3 wheels have a perfect circle for the center, the screw holes for the center caps are not raised, and none of them fit any corner of the truck. These wheels look factory as well. The wheels will not seat against the rotor/drum. I would guess it is less than 3/16", but until they can mic the old rims and these, I won't know for sure.

So to sum it up, there is indeed a difference between Rallys...and I am thinking the earlier trucks had different diam rotor and drum centers, whereas the later trucks might have been smaller ones and never caused anyone any problems.

So now I need to find a shop to machine the centers of the rims slightly.