[Dave at Pelican Parts]

I don't know if that's enough or not--but the method used by the more careful builders seems to be:

1) Take 0.060" off the face of the rocker arm that is toward the valve tip.
2) Shim the rocker stand. I think the amount is similar, about 1/16" or so.
3) Fabricate custom-lentgh pushrod so valve train geometry is correct.

You want the solid part of the adjuster to be parallel to the valve stem when the valve is halfway from closed to open. This avoids putting unnecessary side loads on the valve stems, and results in normal valve guide life. Supposedly if you set this up too far wrong, the valve guides will get loose before their time and you'll be replacing them relatively frequently.

No personal experience with this, just passing on what I have read.

--DD