racers are aesthetically rather ugly, and have traded general river controlability for more speed. If you're lucky, that old boat may be fast, and non-treacherous too.
HIPP used to make fast ww cruisers as part of their non-racing line. They had a fast 13' 2" kayak in their line that was not legal for any downriver class, but was just for fast cruising. Kind of like the Cheta offered by PS Composites.