I've got the same issue, albeit to a less extent. Mine weeps enough oil to stain the passenger side of the block and attract dust. I'm just going to run it as is as my truck will probably be 5.9 Cummins powered one day. The motor in it now takes 5 gallons of oil, it can drip a little and be fine with me. My issue is head gasket related as well. Mine's powered by a "New" in 92' Hercules. It only started weeping when I started hauling "heavy loads" and has dried up as I hauled lighter stuff. By "Heavy", I used the truck to pull an M817 by towbar and some MK-14 trailers and one MK-18 trailer. The heaviest weight wise would be the M817. I think that the military tried to fix the head gasket issue with trucks in regular use. Alot of our's have sat for who know's how long and we're just now putting them to use.