Edelbrock retrofit hydraulic roller lifters (#97423) are a set of 16 precision lifters for 1986-and-earlier small-block Chevrolet and selected 348/409 W-series engines. They allow early non-roller blocks that used conventional lifters to be converted to hydraulic roller-style valvetrain components, offering improved tolerance control for street and performance applications where specified.
Edelbrock Retro-Fit Hydraulic Roller Lifter Kit for SBC Engines