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

BTW, again looking at your numbers it's not unusual to see twist and roll in a machined surface like that after it has been run. You can indicate the face of the head in the mill and correct it but damn, it just isn't worth it to me. Make a clean cut running the average from end to end and side to side and take .010 off of it and go.