Purchased from a knowledgable part supplier with thorough hands-on knowledge of 63-64 Cadillac engines, who checked the part before sending it to me. The oil pump driven gearSee S bore and the pressure relief piston bore are both .002 over and within the .005 tolerance as stated by the seller. There is also some scoring in the oil pump chamber and bottom cover neither of which will affect pump performance according to the seller. There are a few water pump bolts that will need to be extracted
Price is $300 plus shipping and packing.
If interested shoot me an email: Lawbuilder@aol.com