Loren Posted December 3, 2021 Report Posted December 3, 2021 The hydraulic parts for DPCD cars with the Lockheed system are the same year for year. A 1949 Plymouth 10 inch drums uses the same wheel cylinders as a 1949 Chrysler with 12 inch drums. Shoes & drums come in 10, 11 & 12 inch sizes as measured by contact surface inside the drum. www.oldmoparts.com has a nice online catalog which shows the interchange of the various parts, that may clear up the confusion. 1 Quote
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