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3b ...The R-models had their engines all pulled, rebuilt/blueprinted, and probably “tweaked” for best performance with horsepower ratings nearing 375 hp. Today’s engines are indeed more powerful, but still must adhere to strict guidelines. Heads and blocks are mandated to be as original, so roller engines/cams and aluminum heads are out. Overbores are limited to keep displacement as close to stock and the induction must also be as originally provided by the manufacturer. The engines must be in stock locations and no dry-sump oiling systems are allowed... View Related Article
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