Main Bearing Set, new, for 1939 through 1948 Ford Flathead V-8, at.030 undersize. Like Ford part number 81A-6331-N and 81A 6333-N which makes set 81A-6330-N. Interchanges with Federal Mogul 533M 30. If you buy main, rod and cam bearing sets in one order we will pay the shipping in the USA.