Longer wheel studs?

I am going to guess this is your problem. The car has 10" factory brakes and the new wheels are shaped wrong to clear the drums (too small on the back side) so they are riding on the drums. Same thing with the caliper but with the caliper off the car the 10" rotor is about 2 inches behind the hub instead of flat at the 10" diameter against the wheel like the rear so it will clear. The 70 a body also has bells on the drums from the factory unless they have been replaced.

Um, no. The rear wheels don't even come close to hitting the drums. As I stated before , We only need a spacer on the rear to keep the inner section of the TIRE from rubbing on the leaf spring. As far as the front goes, the reason for the spacer is to keep the wheel from rubbing on the caliper. Actually the only place the wheel contacts the caliper is where the center of the wheel is welded to the rim.
It appears these aftermarket wheels are alot thicker where the studs come through. I don't have any stock wheels to compare them to though.
By the way these are 15" wheels. I will do some more measuring of things with/without spacers to see if we all get an answer to this one...
Thanks...Pete