For 1971-1974 GMC C25/C2500 Pickup Expansion Plug Kit 77861MJRS 1972 1973

1974 GMC C25/C2500 Pickup 5.7L V8 VIN: V GAS. 1972 GMC C25/C2500 Pickup 5.7L V8 VIN: J GAS. 1972 GMC C25/C2500 Pickup 5.7L V8 VIN: H GAS. 1971 GMC C25/C2500 Pickup 5.7L V8 VIN: B GAS. 1971 GMC C25/C2500 Pickup 5.7L V8 VIN: A GAS.