Rule 11.2.5: Clutch assembly. All clutch assemblies in the Street Stock Class must weigh a minimum 32 lbs. No matter what engine is used.
Upon further review of Rule 11.2.5. it appears the 604 GM Spec was allowed the two disc clutch. This has proved to be effective and long lasting. Many cars are currently running this same setup. Effective today, all vehicles will be allowed to use these lighter weight clutches, eliminating the 32# minimum weight for the package.
