Funny thing is I used to drive those things all the time in the army. But for the life of me I can't remember what the engine looked like. I never liked the little beast I preferred the 3/4 with the old flat head six. Talk about your bulletproof drivetrains that thing never quit. Wasn't too fast but what the heck it never stopped either. The M-151 if I remember correctly was made by Ford but had the same problem as the early Corvair in that the rear axle would "jack up" if lightly loaded and you didn't watch your turns. They used to show some kind of film about it to people who were getting their military driver’s license. Otherwise it wasn't a bad little vehicle unfortunately land mines would ruin your whole day real fast. I’m glad they replaced it with something a little more substantial.