Hello John, I just rebuilt a 544 engine last week. I had my machine shop bore the block and install new cam bushings.So I can't say for sure but i think the rockers get there oil thru the cam bushings. it is possible the bushings spun and the holes are blocked. if you are going to replace the cam then you could check it out. Good Luck Ed
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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