Why the Fuch not? Porsche wheel replicas on an A-Body?

you’re not going to like the answer.
15x8 +0 for the rear, 15x8 +10 for the front...anyone who has messed around with these cars long enough will see the problem. 15x8 are basically a no-go on front disk abodies. Even with the QA1 tubular control arms. I was dead set on doing something different and I always wanted this wheel style on my Dart so I opened my wallet and had a pair narrowed by 1” which did the trick.

You may be better off contacting Panasport to see what they can do for a custom wheel.
I showed my son those pictures....he want some for his car.