I've been looking into this classic pattern. My question is mainly focused on events in California and from what I have seen they may not be super rigid on what they are considering a classic pattern airplane. I'm considering a build of a 62" or so Dalotel powered with a piped .60. Obviously I would hate to do the build and then be turned away from a contest. My thought is that if it were built to what the AMA pattern rules were back in the early '80's why would it not be legal to fly in todays classic pattern events? Thanks for inputs.