Tom Jennings on History channel

[James Fogg]

> The show missed it though, since the MC Pacer was originally 
> a possible candidate for a rotary engine that was replaced by 
> a 6 cylinder for road.  If they had refitted the Pacer with a 
> triced out 13B they would hav ehad a better show if they had\ 
> been racing Pacer vs something with 300 hp.

The original Ford Mustang (1964 1/2) was slated to have a rotary too.
Some early marketing material and a coffee-table book or two mention the
existance of a rotary model, but none are known to have been registered
as far as I can tell.