has anyone milled an LQ4 head .060? are the castings thick enough?

 

I've read some have gone .050-.060 but then the intake dowels need some
massaging to fit and the push rod length changes (preload). This also limits
the size of cam because of piston to valve clearance....flycutting possible

 

I have ran 317's shaved 0.060". Compression comes up to about 11.3, with a 0.051 head gasket. I had to grind the outer edge of each of the intake dowels, both the brass ones and the plastic ones for all 10 intake bolts. It did pull down just fine into place and sealed fine with just the standard torquing of the bolts though.