troubleshooting oil pressure

While you are in there, check the oil pump internal clearances even if it is brand new, unless you did it prior to assemly. If you do check, make sure you include the pump cover clearance.

BTW, I could not tell if the bearing is losing a lot of oil; I never had a low pressure issue nor any need to test. If you use the plastigage, you need to wipe the oil as noted above from all journals. Was the block line bored as part of this rebuild?