The distributor drive gear puller arrived today with a few other parts that I ordered to bolster my parts cabinet.
I am hoping to have some time tomorrow morning to get started - first make sure that the engine is at TDC, check the valves and the distributor alignment. I'll then determine if the distributor drive gear is off by a tooth or two (or is 180º off).
And another scenario has been brought to my attention - the cam gear can also be installed a tooth off - which would require an engine tear down. I'm hoping this is not the circumstance - but I'm slowly realizing that this is entirely a possibility.
Tomorrow holds answers - or more questions...