I guess I should check back on My posts more frequently...
chargerjon,
Maybe have a passenger 'film/record' the oil pressure so You are not distracted by an 'mechanical oil pressure' gauge
while trying to handle all of that massive horsepower & torque -
(your truck does have a passenger seat ?? nes -pa ??).
I humbly apologize, I see you have updated you pressure readings since post # 10.
Thank You so much