Crower 84345X980 Features:

Crower 84345X980 valvetrain kit for 1966-1991 AMC 290, 304, 343, 360, 390, and 401 V8 engines Designed for mechanical flat tappet camshafts with Cool Face solid lifters for improved cam lobe oiling Includes dual valve springs, matched steel retainers, and valve stem seals in one engineered upgrade package Built to control aggressive cam profiles and support high-rpm valvetrain stability from 7500 to 8000+ rpm

Kit AMC 290-401 Dual Spri Dual Spring Cool Face Features:

• Mechanical flat-tappet cam compatibility for 1966-1991 AMC 290, 304, 343, 360, 390, and 401 V8 applications
• Cool Face solid lifters for improved cam lobe oiling, better lubrication control, and reduced high-rpm valvetrain heat
• Matched dual valve springs, steel retainers, and valve stem seals for stable high-rpm operation and consistent valve control
• Supports aggressive cam profiles and reliable valvetrain control in 7500 to 8000+ rpm builds for strip or track use
• Complete valvetrain upgrade kit for stronger mid-range and top-end performance in limited-street, race-focused engines