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This ACL .30mm oversized main bearing set is intended for 1955–1967 Chevy V8 engines (265/283/302/327) where the crank has been machined to an undersize journal. The set supplies +0.30mm main bearings to reestablish proper bearing clearances and support crankshaft rotation during engine rebuilds, serving as a direct replacement solution matched to the corresponding crankshaft size.
ACL 1955-1967 Chevy V8 265/283/302/327 .30mm Oversized Main Bearing Set
