Keeping the faith car is 605 cu. in. and is under 3000#. Karbelt car is 605 hemi and is not legal for nss rules. It would have to run afx. I raced nss for 10 years and raced against the 422 cars alot. They are fast but seem to always have pushed the rules and got away with it to(bring up car count) We had gotten in several heated debates at the races. There are several old pro nss cars that would go into the 8s (cu. in.- wght) but motors are not legal for nss.