I am rebuilding my bronco power steering gear box and was going to change it from 6 turns to 3.5 turns. This is saginaw gear box off a 74-75 bronco. Can anybody tell me which gearbox I can get the part to make this work. I was told a astro van would work but the pitman arm is on the rightside, the bronco is on the left side. Thanks, CLAYNE