It's right- - - -all engines lose some oil pressure when they're hot. Unless he put a brand new high volume oil pump in during the rebuild, low pressure at idle is not a problem. Or, at least it's been that way since the mid-1950's when I started paying attention to such things. People can worry themselves into a frenzy about dropping a little pressure at hot idle, or just get over themselves and accept it. Your choice!
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!