Ford: 1977-94 255-302/351W, 1970-82 351C/351M/400M, 1973-93 370/429/460, roller rocker conversion kit. Crane's roller conversion kit gives you a low-friction fulcrum conversion system that replaces those power-robbing "sled" type fulcrums. Simply mount your OEM stamped steel (non-adjustable) pedestal mount rockers on the new needle-bearing fulcrums. Designed as a "drop-in" conversion, the kit comes with all hardware except rockers, and uses the same premium needle bearings used in those high-buck aluminum rocker arm sets. NOTE: specs & photos may vary