I have a 1951 D6, its been sitting for about 10 years.
Got you beat. I have a rear tilling Toro that’s been sitting for 15 years.
LOL!
Figured Battery Oil Fuel Grease
It really helps if you put some context with your posts. Look on the forestry forum. Dozens of old machines that have been sitting for decades.
Welcome to HEF, Woodman !
Forgot coolant and whether or not had coolant or straight water in it long ago. Test engine oil for Water and look for block cracks before add antifreeze.