If you become curious, checkout Welcome to Landracing.com - I go to the USFRA show in September (don't take your GT40). Check the 130 club and 150 club on the USFRA website.
Its all great fun, the mile events are wonderful. If you have never legally put your foot down for a mile or two (or 5ive) you haven't lived.
Lots of interesting machines (180mph tugboat powered semi truck?), great folks and lots of fun!