Certainly you remember the Corvair! GM introduced it in about 1960 along with some
other economy cars. The Corvair was the 6-cylinder answer to the VW Beetle, with
air cooling, etc. It was a great car and had a lot going for it until Ralph Nader
got a burr under his saddle about how it might fare against larger vehicles in crashes
and wrote his famous book "Unsafe at any speed" which pretty much wiped it out.
A lot of the engines were used for aircraft but they are indeed automotive engines.
Note that the head is aluminum and air-cooled, so it operates at higher temps than
B16, B18, B20, B30, etc and since you are pressing guides into aluminum, more care
is required. Other than that it is a great writeup.
--
George Downs, Bartlesville, Heart of the USA!