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The L-88, 427, which was the King Kong of Chevy is 69, redlined at 7000rpms. In 70 they introduced the LS-6, and LS-7's, which were aluminum 454's, redlined at 6800. I would say that is about it. Now, keep in mind, these were steel crank, 7/16ths rod, 4 bolt main blocks, forged piston, high compression, and cammed to the gills. NOT stock, by any means.

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