Agreed with Gacknar about the selection, but I may add a little to explain.
A converter is not really a converter, it is a multiplier. Should actually be called a torque multiplier in fact.
Ok, that being said, the small displacement engine cant benefit from a very low stall speed, because it just does not create enough torque at the very low end of its rpm range. larger displacement engines can pull from very low rpms, and these larger engines can find many benefits.
However, this is not the case with your 302. Your 302 is going to need a little help. Torque is not quite where it needs to be, and a few extra rpm's can make a huge difference. A slightly higher stall speed is rather helpful.
Note, higher stall speeds also generate some heat. Heat is not a transmissions friend.
Keep you new trans cool with a larger aftermarket cooler, and now would be a great time to add a trans temp gauge.
You will be spending a pretty penny for this new transmission, its a good idea to spend a few extra bucks to help maximize the life of your new investment.