The first generation square body trucks (73-80) are still going into the pick a part yards. But virtually all are long beds, and most are beat to death. Clean frames and cabs for most part, but too far away from any customers. Have resisted buying any super large parts like cabs and frames due to difficulty in finding buyers. Once in a while a clean door or even fender can be found, but that’s unusual. Fenders tend to be hammered, and doors usually also, with dents creases and multiple mirror mount holes. Do know a WI based transporter, who is relocating to DFW, he does 71-76 GM B cars and square body stuff. He might have something.If you were going to come east, depending on the price I would be a serious buyer for some c/k series sheetmetal, maybe multiple sets of some... again, depending on price and it being true gm original panels.