The only problem with the Ford built-in controller is that it is not compatible with an electric/hydraulic controller for disc brakes. Bill Kerfoot WBCCI/VAC #5223 1973 Dodge W200 PowerWagon 1977 Lincoln Continental 1979 23' Airstream Safari and soon a 1954 double door 30' Liner Orange, CA http://www.tompatterson.com/gallery/Bill-Beth-1979-Safari