I've welded 2 up with the same cracks, one I had to pull the lower part of the blower forward, I hit a ice bank on the other side of the road and the housing at the bottom tried to rotate backwards, making it crack in that very spot, both sides, that is a stong point as the blower hitch mounts right behind that, mine went back so far the aguer hit the back of the housing, another common crack is on top out where the sides are welded in the front, I've fixed many of them.