Not really sure what the CM numbers are, all I know is the early one has the older 2 port configuration, with the small plug and the newer one has 3 large ports for the harnesses.
Both have ECMs and harnesses and I believe I still have the pinouts for the tier 3s APPS and the OBD port.
The Tier 4 (final) has a VGT turbo and is an EGR engine and when I ran the serial number it came up as a generic build stationary engine.
The tier 3 is from a chipper/shredder that had antifreeze in the crankcase, which, according to the last owner, turned out to be introduced by the equipment, not the engine itself.
It has a light tick (knock) when I hand crank it, so it needs torn down.
They are both for sale, I had delusions of making them into something useful, but it's not anywhere close to being on my list of things to do.
Mark.