This is why if you port your heads, port your intake

Patmo said

I used a 1/8 carbide endmill in a dremel and it worked great!

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I’m a firm believer of the “whatever it takes” way of life but if you do this for a living or every month a dremel and anything isn’t the right tool for the job. To do this job right you have to use tools that allow you to properly shape the ports. But yes gasket matching can be done with your tool of choice.