The Stovebolt Site Forums The Shop Area The HiPo Shop Ford 9" Brake Line Kit

Thanks Pete. Members, I just found another solution. The thread pitch on wheel cylinder of the 55 2nd series are the same (3/8-24) as the Ford 9" wheel cylinder. I transferred the hard lines from the Chevrolet differential to the Ford 9". The donor Ford differential is a 1972 Mercury Cougar 28 spline. I just rebuilt the Ford drum brake system with new wheel cylinders and hardware. So I can absolutely verify the thread pitch on the wheel cylinders. A conversation with a customer service representative at Sacramento Vintage Ford confirms the 31 spline Ford 9" and the 28 spline Ford 9" wheel cylinder thread pitch are the same 3/8-24 (same as the Chevrolet). Also this Chevrolet Wheel cylinder fits light duty trucks from 55 2nd series all the way up to 1973. So as you try to interchange a 28 or 31 spline Ford 9" into a Chevrolet truck, you'll know the interchange range.