40-60 Medium Duty 21 70-80 Heavy Duty 20 Bel Air 50 Biscayne 39 Brookwood 38 C10 Panel 30 C10 Pickup 34 C20 Pickup 34 C30 Panel 30 C30 Pickup 34 C40 26 C50 26 C60 25 C70 23 C80 23 Corvair 34 Corvair Truck 8 Corvette 51 Impala 54 K10 Pickup 35 K20 Pickup 35 P10 Series 25 P20 Series 29 P30 Series 29 Suburban 34