Borgeson 800111 Power Steering Box Power steering conversion box for 1967-1970 Ford Mustangs with 1-1/8" sector shaft. Remanufactured modern power steering box with a 11/16"-36 spline input shaft and a 16:1 ratio. Power Steering Conversion Box, 67-70 Mustang, 1-1/8" Sector, Remanufactured Made in the U.S.A. since 1914! Official steering components of the National Street Rod Association Industry leading warranty & support