Believe it or not, I got an answer from the Guys at Coan that I wasn't expecting. Craig @ Coan told me that for what I do with the car and only using one speed (second gear) on my Th400 I would not notice or gain anything from switching to any other automatic style transmission. The way the TH400 powerflow thru the tranny is designed in second gear, it has the least amount of spinning weight than in any other gear (1st or 3rd) And going to a glide would actually cost me a lot of money and I would see no change in times. He also said this to be true if I was to use a lenco drive or a bruno.The only thing he told me that would help free up some pwer and weight would be to change out my forward drum to an aluminum drum(7-9lbs of rotating mass) So.... I guess I am going to keep what I have and set it up in the new car.