Hi Ken
Here the photos I was looking for on the head mounted oil filter and part of the service bulletin concerning the New Larger Oil Filter.
Special head bolts
Location of the special head bolts. Looking at this picture I now remember why my mounting bracket had be notched to clear the temperature sensing port and steam relief tube connection. The head on my HUP had been replace at one time.
The normal location on a CMP for the temperature sensing port was back over the rear most exhaust port. In this picture you can see that my bracket had been torch notched to clear the different temperature sensing port location. (The numbers by the head bolts are how I remember to tighten the head bolts in the correct sequence.)
Attached are the primary pages from the Service Bulletins on the change to the larger filter mounted on the head.
Cheers Phil