CAN ANYONE WITH AN ORIGINAL TYPE '54 BED PROVIDE ME WITH A DIMENSION?? I AM BUILDING A 1950 PU ON A BUDGET (AM NOT A PURIST) AND AS SUCH AM USING A 1983 STEPSIDE BED (SQUARE TOP)WITH MY ORIGINAL REAR FENDERS. I NEED TO KNOW WHAT THE CLEARANCE IS BETWEEN THE TOP OF THE FENDERS TO THE UNDERSIDE OF THE BED RAILS. I KNOW I SHOULD BE USING A BED WITH THE 45 DEGEREE TOP BUT THIS 83 BED WAS A STEAL. ANY HELP??? THANKS