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Tom Wesenberg · 09-23-2011, 09:15 AM

If you mill the head at an angle, how are the head studs going to fit the holes? And if you redrill the head stud holes at an angle to match, you still have the head nuts not seating squarely to the head, unless you also mill the top surface for the nuts. Looks like a lot of work for little gain. I'd just buy the new 5.5 head and be done with it. I don't think you could get near 5.5 by milling a stock head.

09-23-2011, 09:15 AM	#4
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Milling a head for compression? If you mill the head at an angle, how are the head studs going to fit the holes? And if you redrill the head stud holes at an angle to match, you still have the head nuts not seating squarely to the head, unless you also mill the top surface for the nuts. Looks like a lot of work for little gain. I'd just buy the new 5.5 head and be done with it. I don't think you could get near 5.5 by milling a stock head.