now rules like that are only as good as the guy teching the motor. not that I condone cheating but if the tech guy don't know how to use a degree wheel and a dial indicator it a useless rule. the majority of the clubs will pull the head. check bore stroke, valve size's, if its been ported and maybe look at the head to see if its been milled . some guys will look to see if the piston pops out of the block and if the carb has been tampered with. . very few will remove the cam cover and look for an aftermarket rod , adjustable cam gear ect. most clubs will check rpm.
actually if you take the time to check a large number of stock cams there it a plus and minus for cam grinds just like any other part. a friend of mine went through 2 5 gallon pails of cams that I have and put each in the block and dial indicated and degreed each cam. took him days, but he did find a few nice ones that would fit within the guide lines of his clubs rules.
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