I just looked at service manual. It is pretty sketchy but it is the second cam bushing from front that delivers oil to rockers. There is a hole in block right next to the third rocker arm shaft support from front. I don't remember if there is a corresponding hole in the head or if the oil goes up along side of the head bolt but the head gasket has a ring in it that surrounds that hole. Like I said before, I do remember that one engine that the rocker support interfered with oil supply. I had started it and ran to warm up for retorque and readjust valves and had no oil to rockers. On another note, perfect circle used to tell us you could run a car a 100 miles with no oil to rockers. They used a test procedure which varied with different models of engines to check for oil consumption through the valve guides by blocking the oil supply to rockers. I do know they run quite a while with just assembly oil but then start raising heck.
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Today's Featured Article - A Belt Pulley? Really Doing Something? - by Chris Pratt. Belt Pulleys! Most of us conjure up a picture of a massive thresher with a wide belt lazily arching to a tractor 35 feet away throwing a cloud of dust, straw and grain, and while nostalgic, not too practical a method of using our tractors. While this may have been the bread and butter of the belt work in the past (since this is what made the money on many farms), the smaller tasks may have been and still can be its real claim to fame. The thresher would bring in the harvest (and income) once a y
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