Went out the other day to start up the triple 6. Pulled the dipstick and saw the gray oil/water trace on the stick. Came back with fresh oil, pulled the plug, and a ton of coolant ran out before the oil. Evidently the antifreeze froze and cracked the block. The gasser is done for.
That being said, I guess it's time to repower; by time i get a block and all the other parts for the gasser I should replace in the process, I could probably find a running D312 diesel ($2000 from Albilene Machine from a 686). I'd thought of doing it anyway but didn't want to change around great-grandpa's tractor for no reason. This seems to have taken care of that. I'm not junking the tractor (see the "great-grandpa's tractor" part).
I know the 666's and early 686's were built with 312's, so is this a pretty clean swap? I know I'll need the diesel radiator. Anything else needed? Original flywheel, clutch, and all that?
I had considered a DT360, but that will require quite a few parts and engineering, and the only affordable one I found I didn't buy at the time. If only my crystal ball worked. Might as well do that T/A clutch finally, since she's gonna come apart.