Sorry, I misunderstood, and thought you had stated that your head did not fit.
Some may not agree with me, but I'd avoid having the prechambers installed when surfacing the head, they are supposed to stick out 0.001 or so.
Valve face depth below the head surface should also be set within spec.
A turbo head should have better sodium filled exhaust valves.
One of the first things that happens with these things running hot is the rings lose their temper, and don't push aginst the walls right. This gives you a car that smokes all the time or off boost even if the rings don't seem too worn.
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