Transmission Options?
A lock-up converter and a 200R4 is the closest I have ever come to an automatic 5 speed. If you build it yourself, use the US Cartool trans mount conversion, you will be close. Do a search on Mopar2ya and Treblig. They are both members here, and did a nice series of write-ups on the conversion. I spent more $ to do a heavy duty conversion in my '68. Best transmission I've ever driven with the exception of some of the modern Mercedes units.