I'm a bit confused at the moment about the ID stamps on Clevelands. I'm fine with the location of the engine number (labled "B" in the below pic), but I have no idea what the code stamped further up is about (labled "A" in the below pic).
I've come across a few different blocks that seem to have codes that don't line up with any engine types listed on the net. The XB in the picture has "R" stamped on it.
If anyone has any info what this stamp means I'd really appreciate it :)