I was watching Speed channel last night and saw coverage of the 2003 Targa Newfoundland. This is an all tarmac rally through 2000KM of Newfoundland over 6 days.
http://www.targanewfoundland.com/index.htm
A GL Beetle would fit into the Classic Modified Specification category... looks like alot of fun. Might have to go and race one of these years because thats what I'm building my GL beetle for !
Sandeep