The Stovebolt Site Forums The Shop Area Engine Shop 1955 Bearings, WTH : )

Oswald - The "F55Y" indicate the engine is a Flint built 1955 Model year 235, but originally in a Powerglide automatic transmission in a passenger car. It would originally have had a hydraulic cam and lifters. I haven't found anything yet to confirm when the passenger car engines transitioned to the newer style upper half tang retained pieces.

If you are going to have to have the cranked turned again, you'll need to source .020 under bearings for the mains, which appear to be "In-Stock" at Summit.