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Thanks to the tidy 2.20-inch big end diameter of the rod, this is the only clearance-grinding needed inside the crankcase. When bigger Chrysler-sized 2.375 big ends are used, get ready for plenty of grinding. The size reduction has no meaningful impact on strength or durability at this performance level, so go Chevy! The stock oil pickup tube boss is drilled and tapped to accept a 1/2-inch Milodon pickup tube, rounding out the oil system upgrades.