Looks to me like you have a D4400 engine on that tractor, given the location of the air cleaner. That would explain your observations. The rest of the tractor is looks like a U-series. It's not uncommon to find combinations like this, as the engines were basically interchangeable between the U and J and earlier
"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"
instead of perfection some times we just have to accept practicality
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