The cranking involved in priming a carburetor that has been sitting for a spell has the added benefit of making sure everything is well oiled (by your oil pump) when the engine does spring to life.
I'm thinking you are incorrect on cranking a BB Mopar with no oil pressure while filling the fuel bowls up
This is one of the old SB Chevy racers myths, it is way better to have the motor stat immediately to spin the oil pump fast enough, above starter revolution speed, to have the motor running fast enough(above 500 RPM) to make oil pressure right away
Mopars V8, all of the older ones, oil the top end through the cam shaft so you need twice as many revolutions on the camshaft, compared to the crankshaft, to get oil to the rocker arm shafts
Do NOT grind on the starter to fill the fuel bowl after a car sits for more than three or four weeks due to the awful pump swill that evaporates and goes bad in less than a month
