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After reading recent threads re oil pump failures @Marcel Backsand reconditioning procedures @JBNeal -thanks guys!, I've been getting into my oil pumps to see what's what. I have 3 pumps. Here's what I found: (P28 Running) M37 (Melling) from a P28 running motor with decent oil pressure (P28 Not Running) Chrysler branded pump from a P28 (not running)- stamped 1314611-99 (C54 New 2003) NOS M37 from a 25" Chrysler 265 - installed in 2003, never run. All pumps looked OK. The M37 Melling pumps had some staining and the rotors were a bronze color and both had the upper shaft oiling hole The Chrysler pump, no oiling hole, but instead what looks like a brass plug The teeth on the drive gears had slight wear marks, but no missing teeth All measurements, that I could do, were within The Freewheeling Tony Smith's tolerances. I used 320 and 400 grit sandpaper on a sheet of window glass to clean up the end covers and housings, then filled the up the cavities with Lubriplate #105 Motor Assembly Grease. Thanks @keithb7 They all operate smoothly, and I assume, will give me minimal trouble. A couple of questions: FW Tony Smith cc'd the older Sealed Power (cloverleaf style) vs. the newer M37 (cross-style) and found that the NOS pump with the cloverleaf style rotors is a high volume pump, moving about 10% greater volume per rotation than the newer style pumps. I planned to use #3 pump in my 265, but if it pumps slightly less that the other 2 used pumps, is that a good idea since it is a slightly larger motor than the P28 230cid motors? How do I remove the brass plug from the Chrysler pump? Grind down and drift punch it or drill it out?