Crower 74400X021F Features:

Crower shaft rocker mounting stand, stand No. 021, for 5/8 in. shaft rocker systems Precision-fit mounting stand for rigid shaft support and accurate valvetrain geometry Application-specific for SBC 10x, 11x, 40/60, ASCS, and select Pontiac 18-degree and 23-degree heads Helps reduce valve guide and stem wear by maintaining rocker shaft alignment at high RPM

Shaft Rocker Mounting Sta 5/8 In. Shaft Stand 021 Features:

• 5/8 in. shaft stand no. 021 for precise rocker shaft mounting and stable valvetrain support in high-RPM racing applications
• Rigid mounting point for correct valvetrain geometry, helping reduce valve guide and valve stem wear under sustained high-RPM use
• Precision-tolerance stand for accurate shaft alignment, minimized friction, and consistent valve timing in performance engine builds
• Fits specialized SBC 10X 11X 40/60 and ASCS setups, plus select Pontiac 18-degree and 23-degree cylinder head applications
• Essential foundation component for shaft-mounted rocker systems requiring exact 5/8 in. shaft fitment and repeatable alignment