Got to get in on this discssiion a little. As the 560 ignition timing is 30 degrees btdc and a 263 in a 706 is only 22 degrees at a higher rpm, maybe you should play with just retarding that high end of the timing down closer to 706 specs. Can't hurt a thing until you get so late it lacks power or heats. Have seen a few of those little six bangers fry , melt pistons over the years but around here no one really works them hard any more. I broke in mainly working on trucks and pickups with that basic engine, first thing I said when I saw the new 560 come off the truck was, what the h---, they put a darn BD engine in a tractor. Back then I wasn't privy to what was coming new as I was new also so it was kind of a shock. But, that being said , I just partially tore down a 560 diesel, pistons are shot, top rings can move up about a quarter inch due to erosion where injection takes place, has rod bearings marked '63. I know head had been off several times and assembled less than precise. Don't know about lower end. Five out of six pre-cups were turned 180 degrees, only one that was not was stuck in so apparently they didn't take it out. Haven't decided how far we are going on this one yet. Had head gasket blown between two cyls but even at that it started under own power. Couldn't believe it after I got it tore down somewhat.
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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