For 1966 GMC PB2500 Van Rocker Arm 29697BFMQ 4.1L 6 Cyl Stock

For 1966 GMC PB2500 Van Rocker Arm 67124DZQW 4.1L 6 Cyl Stock

For 1966 GMC PB2500 Van Rocker Arm Kit 33544SKTG 4.1L 6 Cyl Rocker Arm Stock

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

For 1966 GMC 2500 Rocker Arm 92541DQKX 4.1L 6 Cyl Stock

For 1966 GMC 2500 Rocker Arm Kit 96198TMZQ 4.1L 6 Cyl Rocker Arm Stock

For 1966 GMC 2500 Rocker Arm Kit 19551ZNJT 4.1L 6 Cyl Rocker Arm Stock

For 1966 GMC PB2500 Van Rocker Arm Shaft End Plug Dorman 18642PNTD 4.1L 6 Cyl