Thanks for that info,..
One dozer has spun a few rod bearings and will no longer hold any and keeps spinning them, and needs a total rebuild. That dozer is my workhorse.
The second one has a good lower end, but the heads are cracked, so I may take parts from both and freshen up and make one running one, but still will need a crank, a few rods, and piston/sleeve assys, and 2 heads.
Will cost me about $3500 for the parts and reworking not including my labor. But this is my spare, and chains are worn into the pins, and will cost another $2000 for them parts, and will still need some more work after that.
So, guess the 2nd one will become a parts machine and will look around for another better shape one around here.