The 2 sided nut or the one with yellow on it?

And where is good to tap in to get a case pressure reading? There a better spot than rigging something up with the return? If I remember how the return banjo works one could tap a 1/8 npt in the end of the bolt

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That with the two flats (sorry).

It's adjusted by moving that center plug in (to raise relief setting), or out (to lower relief setting).






If one has the means, drilling/tapping the bolt-head of the overflow-restriction-bolt thingy will work. Just don't damage the metering orifice in the side of the bolt . . .




Nor the protective filter-screen inside the bolt . . ..





I opted to grind away unneeded metal to make me a spot (altered on left, OEM on right) . . .





And install an access-port there . . . .





Works like a champ .. . .

 

Well ain't that slick! I may have to rig that up too...

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