[SEL] OT IH M tractor question for a friend

[Judge Tommy Turner]

I think the only difference was the thickness of the sleeves.  




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> The Super M had 1/8" larger bore.  Displacement 264 vs 247 regular M.  
> The M I rebuilt had a lot of time on the engine.  Interestingly the 
> small end of the rods were somewhat oblong -- apparently due to the 
> heavy cast iron pistons used.  Good solid engine at any rate!
> 
> Bob Holtzer
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