this past saturday,i was up in michigan and ran duel 10 laps of of hotlaps and was joined by 4 supermodifieds,a sprintcar and a couple other midgets on track with all of them and were running quick laps,
knoxvilles vintage event does split up all the different cars,and if there is more then 8 then they will divide the classes,but thats how that club does their activities.
check out the Mississippi Valley Vintage Race Car Association website