Master Cylinder Pushrod Retainer Question

RedFish said
I ordered a new master cylinder from Rockauto ( same 67 b'cuda manual drums ) and it did have the groove for pedal rod retainer. It is rare to find 2 piston retainers though. I would send that one back. Even if the pedal stop wont allow the rod to fall out, it might make a noise just laying in there.
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X You suggest that the Boot and Retainer should NOT be used in place of the temporary single bolt retainer tab shipped with the master cylinder. So you would be advocating it's OK for dirt to get in to the piston bore along with condensation and seepage? Not really sure why you would go that route!