GOT AN OVER RAIL DOG BOX FOR SALE THAT FITS A GMC OR CHEVY STEP SIDE SHORT BED IT COVERS THE WHOLE BED SINGLE DOOR IT HAS A PLACE ON THE FRONT TO MONT A CB ANT.AND THE OUTTER SIDES OF THE TOP ARE BENT IN ODER TO KEEP THE RAIN OUT ITS SQUARE TUBBING ALU.BOX ITS REAL LITE BOX IT WAS BUILD BY OLD SOUTH DOG BOXES 601-508-0624 IT ALSO HAS A RAIL AROUND THE TOP 450 GETS IT