BUILD YOUR OWN STREET LEGAL KART (May, 1962) MECHANIX ILLUSTRATED – THE HOW-TO MAGAZINE
Special thanks to Charles Shopsin for allowing me to use this information from his excellent http://blog.modernmechanix.com website. The permalink is: http://blog.modernmechanix.com/2006/04/03/build-your-own-street-legal-kart/