40-60 Medium Duty 21 70-80 Heavy Duty 20 Bel Air 51 Biscayne 41 Brookwood 40 C10 Panel 30 C10 Pickup 35 C20 Pickup 35 C30 Panel 30 C30 Pickup 35 C40 27 C50 27 C60 26 C70 23 C80 23 Corvair 36 Corvair Truck 8 Corvette 53 Impala 55 K10 Pickup 36 K20 Pickup 36 P10 Series 25 P20 Series 29 P30 Series 30 Suburban 35