I'm going to be moving to a town with steep hills and am considering changing the transmission over from manual to automatic in my 62 Mercury Comet. I have loved the 3-on-the-tree for the last 20+ years that I've had this car, but the new hills are pretty steep and hard to avoid.

I wouldn't be doing this work myself but would take it to a shop.

What kinds of things should I be thinking about for this process? I have a shop I've been working with and have already scheduled an engine rebuild with them so it makes sense to have them change out the transmission when the engine is already out. Or is it important to take it to a transmission only place?

Anything I should make sure the shop does or doesn't do?

Thanks in advance for your input!
noelle