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This ACL .40mm oversized main bearing set is specified for 1955–1967 Chevy V8 engines (265/283/302/327) and supplies +0.40mm main bearings for use with correspondingly machined crankshafts. The complete set restores proper bearing clearances after substantial crankshaft undersize machining, enabling correct journal support during reassembly in classic Chevy V8 engine rebuilds.
ACL 1955-1967 Chevy V8 265/283/302/327 .40mm Oversized Main Bearing Set
