Stealth heads vs Eddy performer rpm

Both heads have very, very similar performance potential. Both heads need some work (IMO anyway) before bolting them on. This includes a valve job and sizing of the guides. The Edelbrock heads can use any head gasket and the springs need to be replaced on many builds because they are not that strong, but the retainers and locks are good with better springs. Where the Stealths need to run one type of gasket, and the retaners and locks should be upgraded with the springs.