That is the photo Fontana had accompanying the write up on the Rhino. More guys don't get them because the motor is in its probational period in which only one person can run it. They are merely seeing if it gives and advantage power-wise with it being 201 c.u. So technically, according to the rules, it's not legal, but they are being waived due to the rev limiter, which ultimatley cuts down on power. It is simply being tested to see if it can be legal for everyone in future years.
If I am not mistaken from a prior club meeting this engine has been in the "probational period" for about 3 years now. Your right technically its not legal but they still get the points and money for winning a race which they should not if its not legal. As for the rev limiter being set by Fontana when has anyone actually checked it after a race to see if it only turn 7800 rpm's?