condition of Head and piston while doing head swap. Opinions wanted. PICS inside

[Dugzy33]

Doing a little at a time with my gt40 head/intake swap.
Need some ideas on what is going on here...

1995 gts
original 5.0 never opened up 165K miles
When I bought it noticed upon hard acceleration (2500rpm and above) a light blueish/brownish/whitish smoke
from tailpipe.

I wasn't too worried as It runs good.
changed o2 sensors no change
did tune up
#7 cylinder plug approaching foul
changed plugs wires etc
still blows smoke
still runs good, idles good, etc
seems to use a little more oil than my last 5.0

So I don't worry about it hoping it is a valve seal issue that will be solved when I put on my newly rebuilt gt40 heads.

So I pop the driver-side head today and this is what I find...

Still see some cross hatching in the cyls
# 7 piston is clean (?)
other pistons are not (expected this)
other exhaust valves are white (expected this)
#7 is not (?)
Kinda thought I would see carbon build up on # 7 more than the others
Here are the pics...

So what is the deal here?

 

[JKady]

Looks like #7 was running way rich, may have a leaking injector, what's the intake port on that cylinder look like? Way cleaner than the rest?

It's also possible that the head gasket was starting to go but I would expect the combustion chamber to get cleaned along with the piston from coolant in the cylinder.

 

[RichV]

Your pics are not showing.

What fould the #7 plug? Carbon or oil?