Now you guys have me wondering what I own. I have a 1954 3100 I bought last year out of a cotton field in the Texas Panhandle.

It was one of those "was running when we parked it" complete old farm trucks.

The VIN stamped just behind the distributor matches the number on the title.

However, the number on the sparkplug side of the block up front is 3733949 which leads me to believe this is a first series 1955 235.

The cast numbers near the starter are OON4 and L196. This leads me to believe this engine was cast on December 19, 1956?

Maybe the farmer who switched the engine somewhere in time actually went to the trouble to change the numbers on the title.

Any thoughts? I know the head is from a latter than "55 235 because the thermocoupler hole has a reducer in it to fit the original temp guage. At least the shop that went through the engine advised this was a later model head and used the fitting as an indicator of this.

Any expertise or advice on the origin of this engine?

This truck has out-lived it's previous owners.