Its great you can work on the same tractor as your Dad, and Grandfather.
Sorry about the barn fire. I bought a parts 8n for the sherman combo it had.It also was burned alongside a barn. Side distributor and timing cover melted it got so hot. Found the float in the carb had the solder melt so the floats were not attatched anymore. Have not tried to re-solder.Also found the heat melted the solder joint on the oil pick-tube.The solder solidified on the main bearing shell. Good luck on your tractor, and thank you for your service.