AFR misleading? Plugs tell a better story?

AJ/FormS said

With the carb off; cranking for 3 or 4 "times" meaning compression cycles, is probably ok. But for future reference, the cranking is done for as many compression cycles, until you get two consecutive same or near same psi readings. It might take only 3 or 4 cycles, but could take many more.

With your results; throw out thye high, and the low, and the rest are running pretty good;if a perhaps a lil high.
The problem I see is the huge 11% variation.
I would immediately follow this up with a leakdown test.

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To clarify, ran starter till cylinder pressure peaked and stopped rising. Did this at least 2 times on first pass. Numbers bugged me, so I did all 8 cylinders again.

These heads only have about 450 miles on them. I know that doesn’t mean they were done right or haven’t gone bad. Two machinist, lost confidence in both. That was a fiasco getting theses heads done. Thought of buying aluminum heads back then, in hindsight probably should have.

Ok leak test next.

EDIT: Just read your edit, that is correct.
Thanks for leak down testing info.