I have a FTI built valve body for powerglide.Setup for hi/lo transbake also pro brake.To clarify hi/lo is where you can leave off transbrake in low(regular) or if want can leave off brake in high gear. Advantages are basically its a option if want or need. Pro brake reacts quicker,but does require TB button to be held while using reverse. Normally cost right at 300 asking$220 shipped to your door. Used very little. I just want to get same thing but aluminum version just for 8 lbs savings and spend more money doing so.