Brake Drum Thickness

[mleder]

Stamped steel drums have a profile on the lip edge that very identifiable., cast iron drums when struck with a hammer have a dull sound compared to a ring sound of a steel one. Taking a welding grinder to the back surface and observing the spark- to a welder or person who know metal working will shows a definite spark that tells if cast or steel. Best advise - throw away the steel ones and get the cast iron drums , again Randy Gross is the go to guy for the brakes on a Model A