PowerSteering

I have gone through so much hassle changing steering gears in and out that I''l sell the car before I do it again. The pumps I have recieved to replace the original are Saginaws even though the seller shows a pump like the original in their ad. There is quite a bit of hardware changing to install a Saginaw. This is a104K mile numbers car. I want to keep it as original as I can. The orginal pump has no leaks. It just doesn't have enough pressure. I asssume the vains are worn.