I put new rotors on the rear, and have rebuilt calipers (by Goldline in Seattle). Brake disc rubs on the caliper by a little. I am going to put in some 12mm (diameter) shim washers between the calipers and wheel carrier. I suspect sitting for 40 years may have forced the trailing arm to bend a little. The washers are different thicknesses from like 0.1mm to 0.5mm

Anyone ever seen this caliper misalignment before?

Mismatch between early and late calipers and rotor depending on model year of your car or potential of the trailing arms if they were swapped at some point

Sounds like you didn't install the brake shield. It's about 2mm thick and mounts between the caliper and arm.

I’m a dope after checking the only difference between early and late calipers are the bleed screw. Was thinking of front calipers

Rear rotor common to all

Honestly, I've never seen brake discs rubbing on the caliper (assuming rebuild or new parts) on the rear.
What was the condition with the old caliper ?
Using washers between caliper mount and the caliper itself is a quick but a really dirty hack.

And no, the mounting bracket for the dust cover does not goes between the rear mount and caliper.

Maybe your offset results from a not correctly mounted rear axle stub

BR

Benno

@Chris914n6
That wins the prize, I suspect. I did not put the shields on yet.

Sorry but your just wrong. Go look at your car.