Oil pump.... reuse or buy new?

I had planned on buying a new one they are only about 40 bucks but I was looking and my old one and took it apart just to see how it worked and I don't see a whole lot that could go wrong or wear out. Should I just save the 40 bucks and reuse the old one?
The old one came off a 318 at they the same pressure as a 360 pump?


When you took the old one apart, what did the wear pattern look like on the inside of the cover? Any scoring on the lobes of the pump, or signs that foreign matter went thru the pump? Those are the signs that you look for when making the new/reuse decision. You can replace/shim the pressure relief spring on your pump, be it ( the pump ) new or used.