You're welcome. That photo was taken the first time it was started after standing for 25 odd years and I started on the cleaning process. These tractor motors are bulletproof and as long as water cools the head, there is oil coming through to the top (it does not even pump loads of oil to the...
Good luck with this headache which turned into an adventure. I see SOR (Specter Off Road) has used stock of the early lower thermostat housing which you will need to run the later water pump. Yes, they are not the cheapest but I have only received exceptional quality used parts from them.
I am...