This:
http://www.acmespeedshop.com/photos.html
Ought to give you a good idea of what Chris was talking about, the E, F and G Production classes within the SCCA field cars that fall within a certain look and year range and those classes are, very much, the inspiration for the wide body 356's. The Speedsters that raced back then, and even today, had/have the wide body look.