Ya I would not bother with the OD trans for a ton of reasons.
A th350 w a shift kit and some quality clutches gets it done.
The motor wants to rev with that cam.
The amount of heat a converter makes is totally dependant on how
much you drive around rugging the throttle. If you are constantly rugging it from a stop light ya the trans is going to heat up.
The stall speed of the converter does not have that much to do with it.
A 10" 3000 stall and a 10" 3500 stall will make the same heat.
The 3500 stall is the one to get if you want max performance with that cam.
Excessive heat is caused by poor converter design and mismatching a high stall with a low gear like 2.73 but 4.11's will be just right.
The 4.11's allow the converter to function correctly on the street and not
heat up or slip excessively under normal driving.
I;d get a th350 and the 10" 3500 stall.
The engine is quite happy cruising at 3000+ rpm on the hiway.
And the converter will not run hot.
Get a trans cooler too.
If I was stuck on wanting to use a OD trans with a stock or mild converter
I would rethink the cam choice even if its already in the motor.
That cam doesn;t get real busy until 3000+ rpm.
It works very well with a generous converter and gears.
The th700r4 trans is a dog.