Here is a bit of update information on the "Mystery" Chevrolet engine that is sitting currently in an early 50's GMC pick-up truck. See the pictures above. I took a good scraper and my soapstone. After cleaning the machined block, at the base of the distributor, I rubbed the stamping full of soapstone rubbings. Then I brush everything off. Guess what, the stamping information shows up nicely. I do not think the engine is a 261. Here is the serial number from the machined block: 0004977 F557. The block casting number is:3837004. I think I am ready to have the experts, here, assist with determining just what year and engine the GMC does have.
Thanks in advance,
Alan
Last edited by Big Al's; 12/23/2018 12:37 AM. Reason: mis spelling
Alan