Borgeson 999031 Power Steering Conversion Kit 1963-1966 Corvette complete power steering conversion kit. For cars with factory style power steering and a 3/4"-36 spline column. Power Steering Conversion Kit, 63-66 Corvette with factory P/S, Complete Kit Made in the U.S.A. since 1914! Official steering components of the National Street Rod Association Industry leading warranty & support