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Bruce is basing the build on a stock '72-era factory Buick 455 block and crank. Naturally, the parts have been checked for cracks, cleaned, and detailed. A major consideration for big-inch Buicks is in the lifter bores and the oiling system. Aggressive camshaft profiles can break the lifter bore castings, and the oiling system was not up to par with the needs of high rpm performance.