Gentlemen,
Good work on the Black Panther. Can anyone help me with a question involving the Dooling 61 racing engine.
I'm trying to learn the date and serial number of the transition from the early "10-fin" to the later, higher production quantity "7-fin" engine. There has been discussion of a Vintage Ignition control line speed class, which might use Dec 31, 1947 as a cutoff date for eligible engines.
I don't have access to any references at this time.
Thanks, Will Stewart