The AMS brackets (which almost every set out is a copy or close to of)had a hole that you could drill and tap the flat part of the head near the valve cover for. Almost impossible to do and get it straight with the motor in the car. Maybe with a good right angle drill. If you drill too deep you can cause issues. Too shallow and the bolt will just strip. The brackets don't fit flat against the head there on most motors further complicating matters. I think I did it on one install and then after that never bothered and never saw any difference. My suggestion is to not bother.
Tl;Dr - not needed.