I was just reading the posts on hydro boosters. I was suprised at the lack of solid info. Just a few quick points junk yard boosters are prone to leak you dont know the history in most cases. You can buy a warranty booster from many sources you want a one year warranty. Look for a rebuilder that tests each booster.Rebuilders that dont test dont warranty there work. Many companies are now building mounting plates for many applications direct bolt in. To bleed a hydro booster of air you need to use ahigh quality power steering fuid not ATF. Your booster install instructions will run you through the bleeding process. And do use a filter on your boosters it will save the life of the booster.