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In the previous installment, we covered the assembly of the short-block, as seen here. It includes Dart's Big M iron cylinder block with 4.500-inch bores and splayed, four-bolt billet steel main caps. To that, an Eagle 4340-forged crankshaft with a 4.000-inch stroke was added, along with forged aluminum JE pistons that were pinned to Engine Pro 6.135-inch-long forged H-beam connecting rods. The result is a super-strong rotating assembly that delivers 509 ci.