M670 Super project

[G706]

I have a M670 Super that my dad bought new in 1968. It now has 13,000 hours and was overhauled in 1993 at around 7000 hrs. In the shop because the ampli-torc lever broke off inside and PTO was out. So while it's apart l check the clutch, why is there so much oil everywhere? Let's pull the pan and check the bearings and change the seal. Now it's been setting in the shop for 6 months instead of being started several times a week. Bearings look great but why is there drops of water on the bottom of #4? Pulled the rear head and there is half an inch of antifreeze in #4 cylinder. And so it goes.