Yep 165 inch pounds or 13.75 foot pounds.

Oh yeah , De carbonizing req,d ! Most likely increased compression caused the head gasket failure after 30 yrs lol. Surprised valves are not floating also due to carbon build up . Usually valve and head cleaning every 300 hrs minimum

Agree, but this thing is like the energizer bunny, just keeps on going.

Unfortunately they don,t build them like yours anymore Bro !

Yep. Couple of years ago we sold a Farmall M, built in 1942, still a good working tractor.

Familiar with the old farmall,s ,had a 43 Cockshutt 40 and a little newer Massey Harris . Good old units , made to last a life time and then some lol.

P.S. to this post: Chatting with a buddy and told him I was going to pull the head onthe old Roper and he exploded. "You really want to try to pull the head off for the first time after 30+ years if it's still running and you don't have to????" He predicted broken head bolts and all kinds of fun and games. Sent me a video of decarboning with SeaFoam with camera in plug hole before and after, think I'll try that. Guess the $5.69 head gasket will become yet another "wonderful thing" stored in my barn. Humor is that I told him about SeaFoam a few years ago and now he's rabid about it. :-)

Thanks for all the comments.

I routinely use Seafoam , for just that reason add a little on fuel fill ups and also a little just a week prior to oil changes , it,s a prevent product that has both lubricity and solvency benefits . P.S. A brass bristle brush and or steel wool are very safe for piston , head and ring groove decarbonizing . They significantly reduce potential for any scratchs that can become cracks .

Yep. Stabil for the "mystery gas," and SeaFoam for all the good reasons in all small engine gas here. I even put it in the two cycles, use a synthetic oil in those as I've found they run much cleaner.