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Discussion Starter #1
Tom,

I've finally got my hands on a new Ford Racing head. I notice the machining marks are very prominent in the exhaust ports. Is there anything to be gained from polishing them? Or should I just leave it alone?

Also, I am going to have the head milled .040". Do you know what the Roughness Average (Ra) should be? Is between 20-30 right?
 

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Unless your going for insane HP the head as it comes is good , It has been so long sence i have checked the Ra on anything I dont remember what the numbers are anymore

Tom
 

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Discussion Starter #3
Thanks Tom
 
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