Cat 3208 serial numbers

[Cobra GT]

I am looking for the serial numbers on two cat motors that don't have the id tags. are they stamped on the block. One is a 3208t 320 hp and i have another with the aftercooler that is 375 hp. Thanks

[hystat]

every Cat block has the serial numbers stamped in the block. Usually left rear just below cylinder head.

[Cobra GT]

I found out that if it is a Remanufactured block who ever built it is supose to stamp the number on the block.

[hystat]

the serial number doesn't change when an engine is rebuilt