40-60 Medium Duty 22 70-80 Heavy Duty 21 Bel Air 52 Biscayne 42 Brookwood 41 C10 Panel 31 C10 Pickup 36 C20 Pickup 36 C30 Panel 31 C30 Pickup 36 C40 28 C50 28 C60 27 C70 24 C80 24 Corvair 37 Corvair Truck 8 Corvette 53 Impala 56 K10 Pickup 37 K20 Pickup 37 P10 Series 26 P20 Series 30 P30 Series 31 Suburban 36