Mystery (to me and pro shop) solved. That pesky hexhead screw under the grease cup on the rear side of the distributor was missed, so they couldn't really set the timing. They did the best they could not knowing it existed.
As soon as they told me they couldn't rotate the distributor, I knew the answer. The illusive hexhead screw.
They applied their electronic gear to it, an adjustable 6v timing light and some other meter for setting the dwell. And now the car is ready for California next week.
Of course I had to drive home in a thunderstorm.
The brakes are phenomenal.
Idle is at 390.
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