I used 1990 Ford Probe space saver wheels on my roadster. They are 4 X 15 with 5 X 4.5 bolt pattern. The Moons fit but had to re-contour center to clear hub and use short Dzuses. In hindsight I think three dents in the wheel under the Dzus tabs would have helped that clearance problem.
Picture on USFRA web site. WOS 2010 pictures, lower right corner, Page 4, , #1128
Ron
Ron,
Really nice looking Roadster you have there.

Gregg