I've helped a couple of racers in the past that had m&m mods and they are a bread of ther own ford crown vic clip and ther own rear clip.I'd be very suprised to find out they copied anything.
If you are referring to the M&M chassis out of Kalona Ill they are not a copy of anything. They are an original design. The name has since changed to Mach 1. www.mach1racecars.com
I have had 2 of them and any time I have a question Mike is excellent to work with.
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