I did this years ago to my father-n-laws 55. It was too simple. As for the electronics, the only reason you will need to mess with that is if you want the torque converter to lock up and not slip. There are lots of after-market companies who can help with that like Painless Wiring, or TCI Transmissions, etc.

The only thing additional I did for my father-n-law was to install a different plastic gear indicator to show the overdrive between Nuetral and Drive.

If my memory serves me right, I had to move the crossmember a couple of inches. He still has the car if you need me to look at it for you.

You shouldnt have any problems. Let me know if you do.

Troy