I ordered a "rebuilt" pump for my Z from a large vendor. It got here and the logo was wrong and the weep holes. No signs of corrosion. I sent it back and they called me irate that I would say it was a reproduction. He said I have 6 more of these in stock what date do you need. He called back all of them had the same date.... So at some time, someone was restamping reproduction pumps with z part number. This was like 4 years ago