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Division, concerned about high manufacturing costs of their innovative aluminum 215 V8, sought to develop a cheaper, cast-iron engine based on the same tooling. It was given the RPO code JL. They settled on an unusual 90° V6 layout that was essentially the architecture of the '215' less two cylinders. In initial form, it had a bore and stroke of 3.625x3.1875 in, for an overall displacement of 3234.5 cc. It weighed about 35 lb more than the aluminum engine, but was less costly to manufacture. Dubbed the Fireball

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