TPI questions

[t75atc]

I have a '66 Chevelle that currently has an early '70s 350 in it along with a TH350. I also have a TPI setup from I believe was from an '88 or '89 Camaro that was given to me complete with computer and harness. I'm working on identifying it now. How do I identify it? I know it works because I heard it running on a 305 before I got it. My question is this. I want to use the TPI in my Chevelle along with a 700R4 I have. Will the TPI work on my present motor or should I get a new crate motor from GM? I have all the info on putting the 700R4 in, just need to know about the TPI. I will rebuild the 350, if i use it, before I install the TPI. I also plan on putting different gears in the rear end to go along with this TPI/700R4 combo. Any advice on what ratio? The car is just going to be a nice weekend driver. The car still has the original gears in it. The car originally was a 283 PG car.
Any and all help and advice would be greatly appreciated!
Thanks much!