Thanks for the responses.
It appears that the problem is not the FD. I have good fuel flow all the way to the injectors at all positions of the air flow plate with the fuel pump real contacts bridged.

I think the major problem is still the injectors, themselves, and I will replace all injector tubes and seals when (if) I get new injectors. I understand that air leaks cause performance issues. I will also do a complete ignition tune-up at thay time. But first I need to be certain that the basic CIS works and doesn't need a $ 1000 in parts just to find out that the transmission is FUBAR---until it moves under its own power I can't be sure---even though, historically, the transmission is not a suspect item.
I believe the FSM has the procedures for checking all the electrical sensors and actuators even on a non-running engine, so that is the next objective

Again, THANKS for your help. Its good to know I am not alone--even though (because of COVID-19), I am pretty much alone.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags