Need Advice on Machining the Intake Surface of the Head (gasket crush)

69_340_GTS said
The correct amount to take off the intake surface is 95% of whatever was taken off the head gasket surface. 95% of .012" is .0114".

Every time I have had the intake side cut, they take off to much, they tell me they use a use the same formula they always do and it is correct but if you take .030 off the head you can't take 28.5 off the intake, it's to much.