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To endure the added load, the stock Chrysler 1/2-inch main-cap bolts are replaced with 9/16 ARP studs in the No. 2, 3, and 4 main saddles. Half-inch studs are used in the No. 1 and 5 locations. The studs offer nearly twice the clamping force of bolts to keep the main caps from moving. The center main caps must be accurately drilled to accept the large-diameter studs. Noncoated Federal-Mogul 3/4 grooved main bearings are used.