Hemmings Special Interest autos had an article on the Pentastar Star Cars that 404s, but I posted about it at
Permalink #83 in a post from 2012.
The article is gone but DDG has archived the pictures that I didn't post there.
If they'd brought this to market, when I bought my first car the used cars lots might have been full of Beetle-sized front wheel drive cars with five cylinder radial engines.