mcrews -- I found a lot of stuff in the Hemmings blog a while back. For instance in 1951 Studebaker commissioned a prototype from Porsche (the Type 542) that delivered with two engines, water- and air-cooled
120° V-6s.
SIA Flashback – A Studebaker by Porsche | Hemmings Daily
steddie -- The front hood and fenderline is very similar, but that's about it. Chassis construction and drive train are all different. The progenitor of the Beetle is more likely
Josef Ganz or
Hans Ledwinka.
History is fun! End of threadjack, sorry aerohead.
Edit: I'm reneging, but maybe I can drag this back on-topic. I went poking around on Hemmings/SIA site looking at the GM and Ford rear-engined experiments linked at the beginning of that post and found this:
http://blog.hemmings.com/index.php/2007/06/10/sia-flashback-fwd-bendix-swc/
A one-off prototype from the Steel Wheel Corporation (really Bendix) that could easily be mistaken for an Airflow (it has DeSoto grill and headlights). Designed in 1932, finished by 1934; never shown in the USofA—it went to Europe to promote Bendix products
2nd Edit: Man, that thing is weird. Worm gear differential. Steam cooling (!) for the flathead engine. Front A-arms mounted to the engine block/transmission.