With my scratch built hotrod, it will use a '94 Ranger Twin I beam front end, that does have P/S.. I could try to locate a non power box, But there rarer and it will have a BB of some sort.. How well would that box work with a Mopar or GM pump? or an older Ford pump. The Ranger pump bolts directly to the side of the engine blocks on the 2.3 as well as being a serpentine setup, and it would take a pump for an older V8 Mustang to have somthing to fabricate into.. but most any engine I will get will have PS ( being larger vehicles ). So I would just have Napa make up the correct PS lines if it would work ok