Crane 36758PS-16 Gold Race Extruded Roller Pedestal Mount Rocker Arm - Pack of 16 Increased ratio pedestal mount type for 77-00 cylinder heads Secured with stud diameter 5/16 bolt Features increased ratio of 1.7 Non-adjustable and TR (Trim) fulcrums are included Backed by Crane's 1 year Warranty Policy under normal use