Hot Rods question on 235/261 casting & stamped numbers

Does anyone recognize a casting #CON4C109 on the block and is stamped #F3IIJC behind the distributor... 1958 truck 40series, I mentioned the II bars in the two places, no comment from the seller on those and he has decided to call it a 235 and quit looking any further... At this point I'm just curious about these numbers, any chance its a service replacement engine. Thanks for any info, dyno dave

 

C 10 9 is probably March 10, 1959. F 311 JC is Flint, March 11th. JC is the code for a 59 235 with 3 spd trans, used in 31 thru 40 model trucks.

 

Squirrel, thanks the prompt information... Was hoping a series 40 truck would be a 261 engine.
I'll contact the seller and pass on your info to him and keep looking for a 261. Dyno Dave

 

According to the book, 261 Jobmaster was only used in 60 series trucks.

 

http://www.inliners.org/casting/numbers.html Located passenger side, low, forward of the distributor.

 

Cosmo49, the seller is saying that he looked in that area of the block and there no seven digit casting numbers there. The previous ID #'s are was found, he didn't say where on the block he found them.
Squirrel, thanks for series 60 info, dyno dave