[jbc]

In order to put hydraulics on an A with out using a spacer, you have grind or machine 1/8 off the inside flange of the drum and the outer lip of the backing plate. You also need to remove about 1/6 off the outer edge of the brake shoes. Looks like 5/16 or 3/8 should be thick enoughs for a spacer. I wish I had gone that way.