1977 Chevrolet C20 Standard Cab Pickup 5.0L V8 VIN: U CARB Naturally Aspirated GAS. 1977 Chevrolet C20 Standard Cab Pickup 6.6L V8 VIN: R CARB Naturally Aspirated GAS. 1976-1977 Chevrolet C20 Standard Cab Pickup 5.7L V8 VIN: L CARB Naturally Aspirated GAS.
