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On a stock RB block, who has done it?

Any links to the plugs? Ive been told they need to be a shallow plug to keep from bottoming on the cylinders?

1.25 npt tap?

Thanks for any help.



This is what I use on some of my blocks that have
had issues... never had one of these come out...
I put Permitex on it and tighten it up




Mr P what is the name of the company that makes the freeze plug with the nut
in the center?