What converter are you planning to use?
I had an earlier 4 speed in my old car and given its lower weight a stock converter will not work well.
Have a chat to any of the aftermarket converter builders about your application.
Dominator, TCE or one of the many others will be able to help.
I ran the trans cooler in place of the
oil cooler in the front of the car, there was no need for a thermostat or anything like that.
TCI in the states can supply a stand alone PCM for the trans if you want to go that way too, their software is very easy to play with.