I've re-interpreted rules in racing to gain an advantage whenever I could. I have built more than one car that never existed but was allowed by the rules. I've also been the reason for some rules being clarified! It's considered part of the game, and one played very well by Smokey Yunick.
Filing the paperwork doesn't prove that the rumour had any basis in the truth, any more than SCCA letting Pontiac use a 303 based on the "Fact" that it was going to be released as a production engine. That never happened either. Both are typical of the manuevering that goes on between the officials and the competitors.