have you ever seen this before

not too late to check 69 340 GTS, I took pics of the intake before I sent it off. They are a bit cleaner than the others. here are some pics of the intake when I pulled it before I sent it off.
It looks like those 2 ports got cleaned also. The heads and intake were new when installed by Butler. According to the paperwork both the heads and intake was ported. You think something got in there when they put the fire out. He told me that he put it out with a fire extinguisher. He had an air cleaner on it so I don't know. What would cause just those 2 ports to get it. same ports on both heads.