I agree with Mike. If you have it apart I assume you are boring. If so at least get a set of hi comp alum pistons. Have the cam re-ground to stock (it's got 0ver 68 yrs wear on it ) and maybe higher ratio rockers and if timing/mag or dist / carb are all tuned right then that's not much more than a regular top end overhaul but will make a lot of diff over base line. When that late A was new there weren't many (if any) 35-40 hp tractors that could out pull it. And you would probably be at 45 when done. It probably has no more than abt 32 right now. Think they were abt 38 new.
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Today's Featured Article - Restoration Story: 1964 JD 2010 Dsl - Part 2 - by Jim Nielsen. Despite having to disassemble the majority of my John Deere 2010's diesel engine, I was still hopeful I could leave the engine-complete with crankshaft and camshaft-in the tractor. This would make the whole engine rebuild job much easier-and much less expensive! I soon found however, that the #4 conrod bearing had disintegrated, taking with it chunks of the crankshaft journal. As a resul
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