Although it looks simple, the best kits can be very complex. The best kits require drilling holes in parts etc. I had enough problems, even having the trans builders do the work, with kits that I finally added it up. You are money ahead to call Turbo Action, ask for thier manual/auto valve body and install the whole thing! Believe me, they have done thier homework and it results in the best shifting 727 I have ever owned. From your screen name, it sounds like you have a very nice and expensive car. A "trans kit" caused me to have to pull and replace a 727 after the car was together, painted etc. Do you really want to know the cost of a "kit" vs. a valve body?