The major problem with most all of the nostalgia ss/races is that there are too many different organizations with too many different rules.This limits the car count at any event and for these events to servive there has to be increased car counts.
My opinion is that if it looks period correct let it in after all its nothing more than a bracket race.The more cars the larger the events and more interest.If you insist that it be period correct then what is the definition of the period that you are trying to capture,1959/1965,1966/1975,then define it as such.In those periods we saw the changes from factory built cars with Atlas Plycron 7" tires to modified factory cars with 14" Goodyears and so on.So event promopters need to put aside all the BS and let anything that looks nostalgia compete.When two cars make a pass what does anyone know whats under the hood,2 fours,single 4 or TB injection and who cares.Seeing a 65 hemi or 63 409 Chevy or 427 Ford or any of the aforementioned brands with small blocks blast down the track is what your mind formulates as a nostalgia race.If it walks like a duck and looks like a duck then its a duck.That the duck had a good meal of grain or a hard snort of cocaine and puts on a exciting and graphic display of performance is what counts and the more ducks performing and the more people watching these displays of performances will help a dying sport possibably servive.