Evo Billet Tappet Block Kit With Big Axle Powerglide Tappets
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"Evo billet tappet block kit with big axle powerglide tappets. With polished blocks. Designed to accomodate a gross valve lift of .500"" at the valves. This is about .350"" at the tappets, leaving a clearance of .035"" roller-to-block free play."