Seems I have an ignition issue. Really not happy since this points to my new-fangled electronic ign system. Something to do, I believe, with the coil. More testing needed.
If you have any handy, you might want to clip a GM HEI ignition module (grounded on a heatsink, of course) to your wiring - if only temporary - to see if the module in your new distributor failed.
Not sure if I know a source for a module like the one in your distributor. Might be something generic and unique to it.