According to the Dealer Data Book, on the 3800 model ADs (1-tons), DRWs were an option available on the:
3802/3812 -- Flat faced cowl, and cowl and windshield
3803 -- Cab and Chassis
3808 -- Cab and Chassis with platform body (Flatbed)
3809 -- Cab and Chassis with stakebody
Not available on:
3804 -- Pickup
3805 -- Panel
3807 -- Canopy Express Probably because the "availables" didn't have rear fenders and the "not availables" did.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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