Take the block to a company that specializes in crack repair and get there opinion I have seen blocks with holes repaired better than new, also have seen minor cracks that were nonrepairable. My advice is get a professional to take a look, it might be cheaper than searching all over the country for another block getting it home and finding it is cracked also. I have seen two blocks in my life that I considered junk because the had froze and broken to the point that the cast iron was deformed but after the repair they were good as new, one was repaired in 1970 and was still in use a couple of years ago when I lost track of it.
