As this project took place in Colorado, locating a replacement engine nearby proved to be a challenge; however, after considerable effort a candidate was found -- out of a Pinzgauer, bizarrely enough.
It was not much of a motor anymore in its as-found state, but underneath the crust it looked OK, so it was worth a try... Some favors were bargained, and the motor was loaded up and brought home.
This second engine had previously suffered a water pump failure that sheared the timing belt and wrecked the head, see the valve head marks on the pistons; the motor got replaced and then become a yard decoration. Getting it freed up and pulled apart after spending several winters outside was a battle involving some caveman techniques, but the block looked promising after stripping it down. It still had room for overbore so it went in for machining to see what would happen.
Getting ready for final hone:
This time the results were a win; the block came out in the 2nd overbore (.040"/1mm) looking great.
