Borgeson 800110 Power Steering Box Power steering conversion box for 1965-1967 Ford Mustangs with 1" sector shaft. Remanufactured modern power steering box with a 11/16"-36 spline input shaft and a 16:1 ratio. Power Steering Conversion Box, 65-67 Mustang, 1" Sector, Remanufactured Made in the U.S.A. since 1914! Official steering components of the National Street Rod Association Industry leading warranty & support