289 High Performance V8 Slide On Stamp Steel Crank Shaft
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The 289 High Performance has a slide-on stamped-steel crankshaft counterweight to make up for additional rod weight created by heavier 3/8-inch rod bolts. This is why the Hi-Po has a narrower timing chain. If you're going to run a dual-roller set, it must be Hi-Po specific in the narrower width. View Related Article
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