What year Mustang wheels are we talking about? In addition to the bolt pattern being wrong, the offset on the newer wheels (94 and up) are extreme positive, similar to front wheel drive. Chances are they won't work for you.
what other stock wheels would fit on stock axles ?
Ford pickup truck wheels thru the '70's used the 5 on 5.5" bolt circle, and used similar offsets. I think it may even go past that, as I recall '80's (big) Broncos used that b.c. and many of them were aluminum.
1952 F-1 Flat V8 3-on-the-tree MSD, Rochester 2G, Red's Headers
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