Quote:
Originally Posted by Tom Wesenberg
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.
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Yes you need to mill the holes and spot face them.
When you are straining for the last hp on a race engine, the extra effort is well worth it.
Milling and machining is not for the average back yard mechanic.
Like you say, much easier to buy a head.