From http://forum.studebakerdriversclub.com/showthread.php?90408-Rebuilt-Control-valves 01 Sep 2015 I used a valve that I got off a 1970 ford Maverick on my 1959 lark wagon.It works great.I bolted the valve part to the Stude drag link and removed the Ford ball stud in the valve and rebuilt it on the Stude Pittman arm ball. The later valve has a anti shimmy valve in it.The valve for an early Chevy or Ford should work providing you disassemble the valve and remove the ball and stud,then put the valve back together on the ball on the Stude Pittman arm.