Just got my valve body upgraded by John (Transdude) at
www.importperformancetrans.com and it works great. It shifts a lot quicker and firm. John did a great job with all the customer support I could ask for. Removing and replacing the valve body wasn't very hard at all. Using 3 day shipping it only took a week from start to finish( to California). Next day or 2nd day would have been quicker.
Driving around town the shifts are firm but very tolerable. At WOT the shifts are quick and very firm which is exactly what I wanted.
You guys that are boosted should give this mod some serious consideration---it will save you clutches. Get in touch with John. He is a damn nice guy and easy to do business with.