Are you saying INSTEAD of pulling the head? or once you pull the head?
Personally I wouldn't even consider doing it without pulling the head.
I've seen some NASTY corrosion develop from less than two years of sitting.
Or course, it does depend on your locale, and how the tractor was stored. But here in the northeast with lots of moist air and wide temperature swings - a cylinder can get thoroughly encrusted in a years time.
You can free them up, but if you start an engine with that much crud in it, you're just grinding your cylinders down needlessly.
At a minimume, I'd pop the head, use a cylinder hone lightly on the areas you can see if they're caked in rust.
Wipe everything out the best you can.
THEN throw in some atf, and you can make sure you get it all around
Give the pistons a good smack with a hammer and block of wood (don't go too crazy). Sometimes that'll be enough to free them up.
If so - crank it a few times - wipe it out - wash rinse repeat.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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