Looking for a serial number from the block of a 273 commando engine. Have no reason to think that isn't what I have, just pulled the motor and saw a number on the block and was curious.
273 does not have a VIN. Generally, unless it was a remanufactured engine and they restamped it, there should be a long number on front of block below the driver side head parting line
I forget the 3,4,5th figures or so is the CID, whether 273, 318, etc.