Thanks Chet - that helps!
As for the location of the oil port behind the starter, it is a screw plug where the oli port was drilled to connect the mail galley to the rear main and rear cam bearings.
If you look on the front left side of the engine, there is a plug with a square drive where the main oil gallery was drilled from front to the rear of the engine. If you look just above the oil pressure relief valve, there is a slotted screw plug. This plugs the hole where the oil port was drilled to the center cam bearing and center main bearing. If you go forward and aft from this oil plug, you will find two smaller slotted oil plugs, one at the front (behind the water pipe), and one at the rear (underneath the starter). You may be able to feel the one under the starter with you hand. This oil port plug is where my oil pressure gage line is connected.
As for the location of the oil port behind the starter, it is a screw plug where the oli port was drilled to connect the mail galley to the rear main and rear cam bearings.
If you look on the front left side of the engine, there is a plug with a square drive where the main oil gallery was drilled from front to the rear of the engine. If you look just above the oil pressure relief valve, there is a slotted screw plug. This plugs the hole where the oil port was drilled to the center cam bearing and center main bearing. If you go forward and aft from this oil plug, you will find two smaller slotted oil plugs, one at the front (behind the water pipe), and one at the rear (underneath the starter). You may be able to feel the one under the starter with you hand. This oil port plug is where my oil pressure gage line is connected.