Anyone know what size reamer to use?

Before I did the WVO conversion I had it all apart and the intake and valves were very gummed up, coated with black soot. I couldnt clean it all out (how to clean valves?) so I left it.

I didnt ream holes though. The price wasnt too bad from dealer. They like my car so for some reason Im getting wholesale pricing. Think it was like $9 per plug so I guess I dont need to ***** too much. Its just the labor involved. Those dam injector lines are like prison bars when you are trying to reach in. I was praying as I probed #6, thankfully that one ohm;d out at 1.1.

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Paul
Benz-less
I need an SDL !