Sy229
Move with Purpose
Recent NY Times article provides useful information on insuring your truck for racing. It seems the insurance companies have been working to close existing loopholes in defining racing - so you may not be covered under your existing policy. The article also provides a few purpose-written sources for racing insurance, although they don't come cheap.
http://www.nytimes.com/2008/10/19/automobiles/19INSURE.html?_r=1&partner=rssnyt&emc=rss&oref=slogin
http://www.nytimes.com/2008/10/19/automobiles/19INSURE.html?_r=1&partner=rssnyt&emc=rss&oref=slogin