I found my Cranking Cylinder Pressure (CCP) problem

Well you were pretty close.
The suspense was killing me.
This a brand new compression gauge on loan from the local auto parts store.
170-180 psi across all 8 cylinders, I even went back and did No.1 twice to see if would repeat which it did.
So now we know.

View attachment 1715783782

That's more believable. Still high. My slant 6 spark knocked at 175 PSI until I did some tuning on it.