Those cast numbers look like "CON4" for the conveyor it was cast on in the foundry (this number doesn't mean anything to us now) and the date code "G247" (wild guess at your code).
As others have said you need to look at the stamped numbers located on the flat surface near the distributor. The block casting number (part number from the foundry) will be made up of 7 or more numbers.
Mike B
