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Installing the four-bolt caps begins with bolting them in and torquing them to spec at the original inner holes. Be sure the mating surfaces are perfectly clean, and install the caps with the bearing locating tang at the same side as on the block. Use extra care to ensure the center thrust bearing cap is centered fore and aft on the block saddle. The stock caps fit inside the stepped-down area of the main saddles, while the Milodon caps extend outward for the angled outer bolts in the web area going to the pan rail.