جاك برابهام
Later, Brabham switched again to Ford DFV engines built by Cosworth, and once again, Judd was hired by Jack Brabham to do developmental work on the Cosworth DFV engines. The Brabham team later sold to Bernie Ecclestone, and Jack Brabham planned to create a new project in engine development. He and Judd founded Engine Developments Ltd. in 1971. In the years that followed Engine Developments prepared Cosworth engines for teams such as Williams, Arrows, Lotus, Ensign and Fittipaldi.