having a little issue...

no.3/5/6/ exhaust valves should be checked as well as all the valve faces, look to see if the seated portion is dark/burnt, also spin the valves 90*-180* and look for light between the face/seat.

1 thou is big when it comes to cylinders, half a thou is ehhh..but might explain ring gaps all lining up.
if they rock in the bores, what pistons...forged? they will do that a lil, like 4-8 thou skirt clearance.

Most of the plugs look a lil rich to me, if the power valve was blown you would have bowl pressure making it though the pv channel and into the mains at cruise, if it was just rated to high for the actual manifold vac at idle in gear and had the combo of too much throttle blade opening at idle it would also give an over rich condition at idle.
People will argue about wether the pv will actually come into play at idle saying it's into the mains yet to initiate it, but thats where the bowl pressure comes in to play..