What you have posted are casting numbers, rather than serial numbers. The serial number would be the one that is stamped on the machined pad next to the distributor. However, the numbers you have posted do tell us a few things. The 3835911 numbers means it is a '53-'55 235 block. The other number CON1 F84 breaks down to the engine being cast on Conveyor 1, and was cast on June 8th of 1954.
