[Y-Blockhead]

Originally Posted by Charlie Stephens

You are going to have to take your drums to a machine shop and have their diameter measured. It was originally 11 inches. Cast iron drums were 11.060 max but I don't remember seeing a number for the steel drums.
Charlie Stephens

According to the Service Bulletins, page 514, "Under no circumstances must any attempts be made to turn down brake drums..." Maybe that is why you don't see any numbers for steel drums.