Has anyone used a wheel spacer to fill in the rear wells on a Duster?

OUR problem is the duster body is wider in the rear than your darts. We can't just make our cars look excellent with different wheels like yours do :)

Plus, if I recall, the 72+ duster 7 1/4" axle is a couple inches narrower than earlier axles.
The bodies are a bit different. You can fit 8" wheels where the Darts are limited to 7's. I don't think the 7 1/4 rears are narrower. It's because the Duster/Demon cars that had the 7 1/4" rears usually had 5" wide wheels. Factory Rallys were only 5.5" wide.