I've seen a mid '60's step side bed mounted on a '53 Chevy pick up. The '53 running boards were cut to match the curves of the new bed steps. Overall the look of the truck changed because of the '60's style bed fenders. They look too big for the truck. Work with what you got - this particular guy did a nice job. He used what was available to him. If money isn't a factor in your decision- get the correct bed for your truck.