that would explain the sludge, needs to have a crankcase vent system of some kind. Sounds like someone put that plug in to try to keep oil vapors from comming out the road draft tube.


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022