I'm no big fan of the Mustang but they do make a good A-arm front end.
There's this though:
https://www.mustangspecs.com/ford-mu...-concept-cars/
[that web page choked my little Raspberry Pi with it's advertisements. I had to restart Chromium]
It's interesting that the 1975 concept looks almost exactly like the current model, but the concepts from the 80 and 90s look weird.
The original concept was a 1,200lb 90 inch wheelbase chassis with a 1500cc 90hp mid-engine. Sound like a Porsche RSK? IIRC it had 12" wheels.