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Hello. Working on a restoration project and I am installing the oil filter assembly on my 58' M37. Can anyone tell me what is the size of the metal lines that come out of the block and connect to the flex rubber hoses? The feed line that come out of the first oil gallery port and the return line that goes into the side of the block close to the starter motor. Google is not helping me.

Thank you in advance!

Rafa

jahrafa - i see no one has gotten back to you yet. i think they're 3/16" or 1/4" with flare fittings on the end. i can measure on Friday, hopefully someone can chime in for now.

Both tubes measure 1/4" on the OD.