Angie,
Yes, the difference between a factory “as-is” and a ground cam of the same lift and meeting the specs is huge. It is critical to making the two 4-cycle engines in this class competitive. If we don’t specify a factory broached cam then we have made this an Animal class and added a couple of HP.
It sounds like your “unofficial rules” are very unofficial. Thanks for trying to help. However, we all need to see the official rules published pronto. The first race is in 7 weeks. It takes 3 weeks to get an engine built this time of year. Then there is testing. We need the rules now.
Rod