Hopefully the last update ...
Looks like my car is back on the road and working again. It seems that the start up problem was due to the solenoid sticking after I shut off the engine. The mechanic unplugged the solenoid and re-set the mixture, and I drove to work for the first time in a month !!!
I suppose the carb-rebuild was a waste of money, but I won't dwell on that, at least Betsy's back on the road.
1976 230.4 W115