Distibutor differences

[Contibob]

Does anyone know the difference between an "A2" or "B2" designation? Timing curve, vacuum advance...?.?

[RICH MUISE]

Bob.....a few months ago a friend of mine was looking for a 312 distributor. The wanted ad I posted led to a bunch of discussions, which may have some of the info you're looking for?
http://57fordsforever.com/smf/index.php?topic=8044.0

[Contibob]

Thanks Rich, I remembered that post but couldn't find it. I think it gives me enough info. Bob