Just went to Lowes and got a 1/2" copper washer, snugged it down real good and.... No leaks even at speed.
It may not be correct, but at least I'm on the road 'till I get the right stuff.
BTY, it's a 235 stovebolt with the '59 AC oil filter canister.


I know you believe you understand what you think I said, but I'm not sure that you realize that what you heard is not what I meant!