cleaning carbon deposit

[quikSHOilver]

I got 77k mile 3.2 and it look great inside as you can see...

Done swapped 3.0 intake cams and cleaned out the spark plug wells,
only thing I am debating whether it would not hurt to use berryman B12 to clean out the carbon deposit in intake tract on heads, supposedly I fill up the tract and let it soak. Will it seeps past valve seat into cylinder/ring land or thru valve stem if have engine turn over upside down to let residues drain out. Would you guys do it?

 

[itwonder]

I filled up the ports on mine and let it soak. Afterwards, I blew out the cylinders with compressed air and cleaned out the oil pan.