So water pump is leaking like a sieve and I will go ahead and do my first, car's second, timing belt change. If the thought of the frustration ahead isn't enough I'm trying to figure out which kit & from where? I'm in Phx so I have to figure in the tax if I consider Coz. Even so, there are many different "kits". Should I go with the basic kit or upgrade to a different one? I'm aware of things like "Do you want an underdrive pulley?" but other than that type of stuff what is your opinion on which one and from where. '94 NA Stage 3