Do not have the distributor code off hand, but it is from a european 73 manual trans with Vacuum advance. Vacuum is ported from slightly above the throttle plates (not much choice) on this weber.

Believe it or not, I had tried the distributor from an 73 automatic. It has a much steeper advance curve and it also has a vacuum retard that is ported off of the manifold vacuum. The automatic distributor looks best on paper but, as one might expect, results in far more pinging (except on aviation gas).

Thanks.