the cars/rules are very similar between the two, the only real difference is the tires, I think it would be much easier just to just go with 8" tires and have one full field rather than trying to separate it, doing it this way I think it would be possible to get up to 20 cars, maybe more, who knows? The reality is, evans mills allows more to be done to the cars than nyss or big 10, so it really shouldn't be an issue, just my two cents.