Jack's Information on Head Porting

before driving the guides out make sure the outer diameter of the guide at the edge is rounded or has a slight radius to prevent gouging the G/H.
 

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I spent a little time this morning cleaning up the head some more with Kerosene, it’s markedly improved in appearance, I thought it might hopefully save the vapour honing guys a little time and thus my dollar.

I attempted to clean up the exhaust ports with paint stripper but I only had leftovers to hand and to be honest it didn’t do a great deal. Am I right I’m assuming vapour/soda blasting will remove the carbon buildup?

I also rounded the edges of the guides like you suggested.
 
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