Hi guys looking at purchasing this engine with these casting codes , just need to confirm if it’s a 1957 Oldsmobile 371 engine ... thanks Sent from my iPhone using H.A.M.B.
https://www.jalopyjournal.com/forum/threads/motor-early-olds-rocket-tech-summary.47584/ https://www.hotrod.com/articles/0901sr-oldmobile-v8-engines/ In the years '59 and '60, where both 371 and 394 engines were available, you can tell the 394s because they have three bolts on the center exhaust flange, 371's have only two. A "loose" guide to ID's are characters cast into the cylinder head at the center exhaust port. The '49-52 engines have no number, '53s have either a #3 or #5, '54-55 have a #8, '56s have a #10, '57-59 have #14, #15, or #16, and the '59-63 engines have numbers from #20 through #23.
Should be a number stamped on a tab on the drivers side of the block right below the head at the center exhaust port. See if it is there and post it up.
The Jalopy Journal
