Discard the 3-4 spring in the transgo kit and reuse your stock 3-4 spring. The 3-4 spring is to stiff for corvette VB that have a 3-4 WOT shift. You can use the Transgo 3-4 spring, but you will need to recalibrate your govenor. (its a lot easier to just to reuse the stock spring) The hardest part for my installation is the TV valve in the pump, I ended up ditch the transgo TV valve and putting a .500 TV valve and filling off the land on the pressure regulator valve (keeps constant oil pressure to the TC)
Sorry, I can't give any real driving comments as I have only driven it 6 miles or so since install.