Quote Originally Posted by Bob Parmenter View Post
There's bound to be a trail of oil from the source on the engine which you can see and we can't. But since we're playing a thousand guesses I'll jump in too.
Does this still have the canister style oil filter? When/if that was changed was the old O-ring removed before the new one installed? Common mistake back when was to leave the old one in because it didn't fall out, and two O-rings won't usually seal properly.
In the Navy '68 lots of very young enlisted around, and everyone looking to save a nickel anywhere they could, for more beer money. One of the "tweet's" (electronics/radio/radar tech) changed his oil & filter on a bone stock '56 chevy, knew nothing of the gaskets and after filling it up took off immediately up towards the main gate, not realizing the trail of oil he was leaving, and wondering what that new noise was that he was hearing..... By the time he stopped the engine was toast, and he was looking for a new ride.

Sorry for the hijack - the old memory was just too strong to pass up.