With a roller rocker, believe it or not, no. The stand position is copied from the factory on most aftermarket cylinder heads, which is engineered for a stock rocker, stock valve, stock cam, etc. The roller rockers have different geometry, and need to be moved.
There is one exception. I had a guy put shorter valves in a TF 190 head because he needed a super duty valve for twin turbos and couldn't get the same length TF uses. He was within .010" of correct, so we left it alone. I have never had an ootb head that didn't need adjustment using a roller rocker.
