Truck Repair: ISB Overhaul, shunt truck, injector lines

Question
I am working on a 1999 ISB-205 in an Ottawa shunt truck.  Problem was lack of power, and black smoke.  Injectors and VP-44 have been replaced, all to no improvement.  Cylinder cutout revealed no identifiable differences, but the good old "cracking of the injector lines" identified cylinder #3 as the culplrit of the smoke.  I have removed the cylinder head, and found that indeed, cylinder #3 was sooty.  Cylinder walls show strange pitting in the upper quarter, no scuffing or cracking.

Is this engine rebuildable, or should we simply be looking at a short block.  This vehicle has almost 17,000 hours on it, which I imagine converts to anywhere from 4 to 600,000 miles.
I haven't priced parts yet, or checked to see if cylinder kits are available.

Thoughts?

Answer
There are not cyl kits for that engine.You have to get a short block,complete engine,or bore the block & get new pistons.If you dont know how to build them,you better get a manual because you have to "grade" the pistons to the block.In other words you have to measure the piston protrusion out of the block across the centerline of the crankshaft.Should be between 0.024 and 0.028.