I have a feeling I know what the answer is but I'll ask anyway. I recently acquired a 401 with cracks on the side of the block. As in several cracks on each side. Given the fact that this block will also need sleeved in one or two holes, does this sound like it's time for a new block? I could possibly save money by having friends with welding experience help me with the crack repair, so this would save money there, but my fear is that more cracks might appear in the future. Plus I don't know if anyone even does block sleeving anymore so this could be moot.