I guess the reason I'm asking that I've got a few of the flatheads in my shop. One is a 4" stroke Mercury with the oldest Hilborn fuel injection unit still alive. #16 from 1950. It also has a magneto and a hell of alot of machine work done on it. It was in 1931 Ford Roadster salt flats car and it may go back in.

Here is my truck:
http://picasaweb.google.com/rjdenton479/1951Chevy3100PickupTruck