D7 17A Engine Problem with Diesel in Crankcase

It's a shame to see an engine killed by a 50 cent o-ring (most likely the fuel gallery seal between the injection pump and filter tower). That coupled with worn out undercarriage definitely puts the value in question. On the other side the 17A is a good unit worth salvaging if you have need for its service.
I'd recommend you start by pulling the block side covers and checking to see exactly what the condition of the crankshaft and bearings are. If it has never been rebuilt it is overdue anyway and yes the engine would have to come out if the crankshaft needs grinding.
As far as phone talk I'd rather discuss the subject here so others can contribute and learn but if it gets to the point where phone conversation is a must we can do that.

Old Magnet if I overhauled the engine would it be better to remove the manifolds, heads and cranking engine first before removing the block to lighten the amount of weight to lift. I was also wondering if the cam and balance shaft bearings would also possibly be damaged? I would guess that the metal particles could be cleaned out of all of the passage ways with the block disassembled? Are parts still readily available for these engines? I might consider finding someone to buy the whole machine for parts since there are a lot of good parts on this tractor. It has been a real work horse over the 40 years I have had it on the farm. It is close to Brownwood Texas if there are any ACMOC members around this area that would be interested in it. I will take some pictures of it this weekend.

It wouldn't hurt to remove some of the bolt ons to lighten the lifting load if your facilities are limited. As far as I know parts are still available. Did the engine actually seize up from lack of lube or was it shut down prior to seizing? A thorough cleaning of all oil passages during overhaul is a must as well as inspection and measuring of all rotating bearing surfaces.
With engine problems and worn out undercarriage I wouldn't expect much more than scrap metal value for the remnants.