I'm about to purchase a (very rough) 71 Jeepster as a restoration project for my son and I. It has the stock manual transmission/Dana 20 and I don't know if I have the patience to teach my son to drive a stick. I was looking at swapping out the manual transmission for the TH400, but I can't find much in the way of specifics on how to do that and am having a hard time finding a TH400 that's not Chevy. Anyone have any idea of what's involved and/or a good source for the automatic transmission? I've read it's pretty straight forward and easy, but not what is actually involved.