The Kaiser Frazer 11 inch drum brakes have the long shoe as the primary and the short shoe is the secondary. This includes the Darrin that has the full size Kaiser Frazer drum brakes. See the Kaiser Frazer service manual page 214 3rd paragraph. In the General Discussion section under front wheel cylinders, there are 2 pages of discussion about brake shoes and cylinders. You can install the shoes anyway you wish, but the proper installation is long shoe front, short shoe rear. The Kaiser Frazer brakes are the floating style as described in the service manual.