Metal on oil drain plug

[PP]

I just cut the filter apart.. not much there a few specks but I understand that is normal..Engine hold 40lbs idling cold and 22lbs hot....60 lbs fast idle cold and 55 lbs hot ....mechanical gauge..off to the detroit dealer I go. Do these pressures seem in line?  322thousand miles.

I'm not a mechanic, but I do watch my oil pressure guage and it is real close to what you stated for pressures (8V92TA) 1983 vintage with 110K Miles. FWIW