Yes, that is the lockup version.
here is a link that has a kit and wiring detail
http://www.transmissioncenter.net/dodge.htm
Parts could be baught cheaper than shown, In a nutshell for a A518(non lockup) tap into govenor pressure port,install a pressure switch that closes at the MPH you want it to go into O/D, and wire it to the the O/D solenoid. For the 47RH(lockup) you would need to have one other separate circuit for lockup engagement. It can get as comlplex i.e utilize the throttle position sensor on the injection pump, or just use a manual switch, but I would open the circuit with the brake switch on the pedal too.
I probably missed or goofed something above posted quickly from work.