The block can be welded and there are shops that specialize in that type of repair as at the Cat dealer we had a place in Brooklyn NY that done a superior job and there are others around that I knowed of years ago. If you want a used block they are a D339 engine in them.I would have someone experienced in tractors to take a look at it and get their opinion on repairing it.They were a good old tractor.
you could have it metalstiched that always works well. Make sure it isnt cracked internally as well though.
It is very likely only the water jacket. JB Weld may do the job. Bring it home and try it. If the undercarriage is as good as you say it is definately not scrap.
Tom
you could have it metalstiched that always works well. Make sure it isnt cracked internally as well though.