A forensic teardown is on the "to do" list- - - - -and I'll be happy to post a picture report when that happens. My Sun distributor tester isn't in operating shape right now, so I won't be able to report on whether or not the repop distributor matches the advance curve of the OEM type, but I just happen to know a crusty old Marine with a 261 engine who just might be persuaded to let me swap distributors with him for a while. My Innova delay flash timing light can be used to plot an advance curve for a running engine, which will be at least as accurate as a distributor tester- - - -maybe even better.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!