There's a possible lead in this thread.
Lots of possible approaches:
1 Fit an automatic gearbox to an existing 7 engine
2 Fit an engine and automatic gearbox that already work together
3 Fit remote controls to an existing 7 manual box.
Choosing between these would depend on what skills you have.
1 and 2 are probably going to require work on the space frame, mounts and tunnel.
3 might not, and the components are widely available.
For 2 one possibility would be the engine and automatic box from a Mazda MX-5, as above. The smaller the engine and gearbox the easier the structural changes would be: what suitable small RWD Japanese drivetrains are there? Is the Suzuki engine in the 160 ever used with an automatic gearbox?
Jonathan
Edited by - Jonathan Kay on 2 Jun 2014 18:25:17