Jack21,
Had a long chat with Performance Automatic's Harvey Baker and we concluded that a basically stock torque converter was the best one for my needs. Low stall speed is his advice - 2000 rpm sounded OK. Thanks for the source for the affirmation! Looks like the Saturday Nite Special I already have is the ideal one to begin with.
cobrashoch,
As to cooling, I have a nice old Art Carr finned aluminum pan which increases the trans's capacity by a quart or two while adding a bit of cooling. I probably should contact the radiator mfr about how good the internal heat exchanger is - if it isn't enough, I'll go with a big
oil/air cooler.
Tom