don't quote me, but some time back in the late 30's, the gmc's used full pressure oiling/bearings. i think chevy used the babbit system up until the mid 50's.
my 53 gmc 100-22, 228 has the full pressure system.
tony


Overland Blue, 1953 GMC 1/2T, 100-22, 228/1bbl, 4sp/4.10 6v, shortbed/fender side/5-window.