John,
Howard is right. I would recommend meeting some of the members from either of the 2 clubs: GT40 Enthusiasts (
www.gt40enthusiastsclub.com) or the GTD Car Club (
www.gtd40club.co.uk). Members will be able to show you their cars and give advice (maybe even a ride). The Enthusiasts club has regular meetings (see the website), but I believe the Detling Kit car show (Kent) is a few months away and then the GT40EC AGM is at Stoneleigh in May so you could come there as well. You can also check out the GTD club for when and where you can see the cars racing, and beating Ultimas and also JPs F40 [img]/ubbthreads/images/graemlins/wink.gif[/img]
Brett