JD;
I don't think anybody new to LSR and wanting to build his or her own car would proceed without reading a rule book. If so, not anybody you would want in this sport. Before and during my roadster build I wore a rule book out. Read everything pertaining to rules, safety, class information, etc. over and over again. In addition, I asked LSR veterans probably a million questions gaining as much knowledge as I could about participating in this sport.
Regarding displacement check, I've never been in a position to worry about the procedures involved in record certification. But that is why a lot of us are here. Working hard and doing what we can to improve your car/bike to maybe some day put yourself in tech inspection for just that.
John