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First, the machining and short-block assembly began at County Auto Machine in San Jacinto, California. The OE crankshaft (PN 3C3Z-6V303-AARM) from Ford was bolted into place (with no assembly lube or oil) using Plastigauge between it and the bearing journals to measure for proper clearance. Then the main bearing caps were torqued to the recommended spec (which spreads the Plastigauge material across the bearing surface), then loosened, and the squish was measured with the supplied, calibrated gauge card. The 7.3L crankshaft utilizes four main bearings and one main thrust bearing-five main bearings in all. The main thrust bearing is located at the rear of the engine. We should also note that the factory camshaft was retained, but the kit supplied five new cam bearings.