Terex 72-31 MP2-U

[Kernopelli]

Looking at an old Terex 72-31 MP2-U. Cant find much info on them. I am wondering what the differences were between the AA, BA and MP2-U models? I assume the BA is a newer model than the AA and the MP2-U was a military model but don't know if it cross over to an AA or BA. or what years any of these models were years made. Any insights on the 72-31's, parts availability and the 471 Detroit 2 strokes would be appreciated.