Master Cylinder Pushrod Retainer Question

RedFish said

I didn't comment on the boot or it's retainer. The tiny sheet metal retainer isn't to be removed and/or replaced by the boot retainer. That tiny sheet metal retainer is the only thing holding piston and return spring in the bore. I don't know if the boots plate would or not. My 67 has the one sheet metal tab and the boot. That 2 hole plate is not present. Good luck to all.

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Look at the photo that shows the small tab piston retainer. Notice that at the 11:00 position a drilled and tapped bolt hole is present. If that drilled and tapped hole is not the bolt hole that matches to the tapped bolt hole that the small tab retainer screw is in and together they are intended to be the bolt holes for the retainer with the boot, what exactly do you think that extra bolt hole is for?
Bottom line is, you are using the shipping retaining tab to keep the MC piston from moving out of the MC bore. The OE design is to use the circular boot mount to do that.