I say get Pete McCarthy’s video on porting Pontiac d ports. It’s old but very well detailed and explains how to make and use a shaping valve. Take your time and it’s not that big of a deal. They are just 6x heads after all and not Ram air ll’s or Something. Start with a dremel to get the feel of using the grinder in there. Then get a bigger one that has speed control. You’ll have that great feeling of doing it yourself and learning something.
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