Engine builders, these American Motors solid lifters are the real deal for performance builds. The 0.904-inch diameter fits standard AMC blocks, and the oil hole design ensures proper lubrication to critical components. At 101 grams with 1.79-inch seat height and 0.012-inch oil hole, these are precision components for serious engine work. If you're building a motor that sees high RPMs, solid lifters give you that consistent valve train control that hydraulic lifters can't match. The machining quality is top-notch - no rough edges or inconsistent dimensions that can wreck your cam. I've used these in several AMC V8 builds and they've held up perfectly through track days and street driving. The oiling passage is positioned right where it needs to be for maximum protection. Yeah, they require more setup and maintenance than hydraulic lifters, but the performance gain is worth it if you're pushing your engine. Pair these with a quality cam and proper springs, and your AMC motor will sing. Don't cheap out on lifters - they're too important to your engine's health and performance. These AMC lifters are quality American-made components that get the job done right.