[bigblockv6]

Back in that era depending in what part of the country the truck was sold being it was a K series 4wd model the truck it was most likely a special order and the dealer could have installed the bed before the customer took delivery. Both my fathers 62 K-1000 and 68 K-2500 had to be special ordered. The GMC Truck Center in San Francisco simply did not stock 4wd trucks on a regular basis.