Hey ya'll, I just purchased a '79 M20K and had the automatic wastegate installed prior to taking possession.  I got off the phone with the mechanic a few minutes ago and he mentioned that the engine was still very easy to overboost.  He said he called Merlyn and they told him that is normal and the plane still needs to be operated by the POH.  I was under the impression one of the primary reasons to install the wastegaste was to prevent overboosting on takeoff.  I have a background in automotive