MoPar Brake Upgrade Options?

Nice work.
Personally, I think the last thing an A-body needs (for looks) is more wheel offset to the outside. Especially with wider than stock tires, the fender lip comes into play very quickly. Even more so on the later 70+ A bodies.

I think I would try to 'rotate' the caliper away a bit from the spindle more so it can be positioned deeper and more beside the spindle. With an evenly deeper discrotor, the wheel itself will be positioned further back too, which would look good again.