The bore diameter is not an issue. There actually is a good selection of pistons 3" to 3.5" if you are willing to go to custom rods. What I was interested is the centerline to centerline of the bores. For example inline chevy 6's are 4.40" from bore to bore. Rocker ratio is of interest, I don't think I have 2 good rockers on this engine, clearance is huge but afraid to adjust it as valves have eaten a pocket into most of them). Was thinking of a reasonable way to replace them, but need to stay close to the existing ratio to avoid messing up geometry and finding pistons with the valves. Suspect it's around 1.5:1, but suspecting and knowing are different. And while we're talking about it, anyone know the factory compression height (pin centerline to top of piston)? Looking at it it looks tall even with the piston well below 0 deck.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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