For 1987-1990 GMC R3500 Rocker Arm Nut Dorman 85829BZRR 1988 1989 7.4L V8

For 1989 Chevrolet R2500 Rocker Arm Nut Dorman 65828HFNG 7.4L V8

For 1987-1989 GMC R2500 Rocker Arm Kit 59524KJPH 1988 7.4L V8 OHV Rocker Arm

For 1987-1989 GMC R2500 Rocker Arm Kit 83211DYXK 1988 7.4L V8 OHV Rocker Arm

For 1988-1990 GMC G3500 Rocker Arm Nut Dorman 81127QWRC 1989 7.4L V8

For 1987-1990 GMC V3500 Rocker Arm Nut Dorman 78746BQDF 1988 1989 7.4L V8

For 1987-1989 GMC R2500 Rocker Arm 55764HGRJ 1988 7.4L V8 OHV Stock

For 1987-1988 Chevrolet R20 Rocker Arm Nut Dorman 29548TRQF 7.4L V8