It's more than just taking a section out of the middle to convert a coupe rear fender to fit a wide bed. where the inside bolts to the body is different,the cutout for the splash apron is way smaller and you have the usual trouble re-welding the bead on the tail. on the narrow bed pickup, the taillight is mounted under the bed corner while the coupe, etc, have it in the fender. That's the only difference.