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Ray Banyas, from Victory Engines in Cleveland, Ohio, performed the machine work and assembly. Here, he marks the area on the oil pan rail that will be drilled for the oil dipstick tube. The Bow Tie block is Chevy's aftermarket cylinder block that offers thicker cylinder walls and stronger construction, but some machine work is necessary for street use. The block also requires the use of a two-piece rear main seal adapter since these blocks are machined for late-model one-piece rear main seal-style crankshafts.