A nice site I stumbled across ( seems I always have to stumble across stuff) that you might want to check out is http://www.rafaz57chevyclub.homestead.com/main.html. It is a great site and easy to navigate with info about 1957 chevys, the models, engines, colors and accessories originally availble.
A forum community dedicated to 1955, 1956, and 1957 Chevy owners and enthusiasts. Come join the discussion about restoration, engine swaps, reviews, performance, modifications, classifieds, troubleshooting, maintenance, and more! Open to all models including Belair, 210, 150, Sedans, and Nomads.