Too much carbon buildup? (photos)

[nameiztaken]

Took a peek down in my 4.0 OHV’s cylinders using my phone through the plug holes in the head, and this is what I saw.
This does look like a fair bit of carbon, is this normal? I am experiencing ping.

I ran 3/4 a bottle of seafoam through the intake yesterday, allowing it to soak for an hour before driving hard. These images are after the seafoam (and 2 bottles of techron a few weeks ago).

 

[Rick]

Have you cleaned your MAF? My 1st gen likes to ping when it's the slightest bit dirty.

The carbon in the photos looks pretty normal for an older engine.

 

[92exp4x4]

Have you cleaned your MAF? My 1st gen likes to ping when it's the slightest bit dirty.

The carbon in the photos looks pretty normal for an older engine.

I agree. How many miles is on your truck? Does it consume oil?