For 1966 GMC I3500 Rocker Arm 96261RHNW 4.1L 6 Cyl Stock

For 1966 GMC I3500 Rocker Arm 24748SWNZ 4.1L 6 Cyl Stock

For 1966 GMC I3500 Rocker Arm Kit 67168RCSZ 4.1L 6 Cyl Rocker Arm Stock

For 1966 GMC I3500 Rocker Arm Shaft End Plug Dorman 77448XJQN 4.1L 6 Cyl

For 1966 GMC 1500 Rocker Arm 33158DQMD 4.1L 6 Cyl Stock

For 1966 GMC 1000 Rocker Arm 74976VNBQ 4.1L 6 Cyl Stock

For 1966 GMC 2500 Rocker Arm 32743JSPX 4.1L 6 Cyl Stock

For 1966 GMC 1500 Rocker Arm 51268VXCT 4.1L 6 Cyl Stock