[Dave in MN]

I am not sure tapping three holes directly into the oil galley and externally drawing off oil flow will leave enough flow to the bearings, cam and timing gear area. I guess time will tell. Hope it works.

The attached photo shows an alternate way to decrease the oil pressure to the rear main bearing. The installed pop off valve will keep some flow to the bearings and the modification is hidden from sight. If the small size of the pop off will not handle the flow of the pump, an additional one can be installed on the other side of the oil galley. If you are wondering about the carb jet you see: I have restricted the oil flow to the cam bearings in the photo by installing a carburetor jet. The opening over the cam gear is also restricted. When this photo was taken, I was developing about 45# of operating oil pressure in the system.


Good Day!