I was almost on my way to Port Alberni for the Thunder in the Valley races two years ago. They will let you go up against friends, or some one you want for a grudge match during the practice days. My buddy, who's raced his 67 400 a few times and I wanted to make a couple runs against each other. Thought it would be fun as I've never raced before, and at 67 years old then, I would most likely have been the oldest rookie at the meet. But work happened, gotta eat.
I figured someone there would let me know what class I would have to run in.