Dana Spicer with 12-1/4 Fast-Rise Brakes - Pre-1996, MUST USE WITH FABRICATED OPEN END BRAKE SHOES AND 1-1/2 DIAMETER ROLLERS., WHEN CONVERTING FROM EARLY DESIGN FAST-RISE WITH 7/8 S-CAM HEAD, MUST REPLACE ALL CAMSHAFTS., MUST USE WITH BRAKE HARDWARE K