Am I missing something? I checked out the rules in Nostalgia Muscle Car (NMC) and aside from a few odds & ends, it looks like any NHRA/IHRA Stocker, with a body
1985 or older, would fit. (Full tree with preset indexes: 11.5, 12.0, etc.) Nostalgia Super Stock (NSS) might be a bit different, but I didn't read their rules.
This is the link, but I can't get it to load at the moment
http://www.nmcadigital.com/dl/rules/nmc.pdf
Some exceptions -
* No 2-steps, except stick.
* No crank triggers.
* No driveshaft sensors.
* No wheelie bars.