Hy Memphisdoug, further research has yielded the fact that the wheel cylinder thread is 7/16"X 20 t.p.i.. Raybestos still lists their p/n H5373 1 3/8" o.a.l. and H5374 1 3/16" o.a.l., both of these parts are available at RockAuto for less than two dollars apiece. The copper washers should be available at any F.L.A.P.S. once you know what size you need, they are a pretty precise fit, hope that helps.
