The oil pressure regulator is the only thing thst comes to my mind. If it is sticking as the volume drops, as speed drops to idle, then it will drop the pressure as you described. Bearing clearances do NOT change for a restart.


1953 Chevy 3100
261 and SM420
53Chevy 3100
1953 Mack Firetruck
1972 Porsche 911
1986 Honda Goldwing