My good friend and I are putting together a 46 ford coupe with a 51 merc flathead engine. The engine was picked up and magnaflux and found to have a crack of about 1/16" running along number 2 cylinder wall. My question can we weld it ourselves(were both fairly good welders) and hone it out afterwards or should we sleeve it. I love working on flathead engines but neither of us has done this before. Would we still get water pass the waterjackets if we sleeved it, and would we have to bore the remaining cylinderswhich are Ok but the difference in cylinders thickness between #2 and the rest would be different would they not?