I had forgotten about this build Tim. It turned out really nice. Today I watched a UTube video from an Australian armor museum that restored one of these such that it can be driven. It had no original engine or drive gear and they had to fabricate 3 of the suspension units. The engine they decided to put in it was a small car engine and the drive was done with a hydraulic pump and motors. It wasn't done to run around a whole lot, but they can move it around and drive it during their annual armor day.