I have three, count them, one...two...three bellhousings for an sm465 and all of them have the exact same crack. It starts from front bottom corner of the whole for the clutch fork and runs down arond the bell housing. The longest one is about 8" and the shortest one is about 4". Since they all have it I am assuming this is very common. How bad would it be to use one of these things? I was planning to just drill a hole at the end of the shortest crack and go with it. It will only be in there for a year or two at the most. I should be replacing the engine and swapping to a hydro clutch or a steel bellhousing set up in that time frame. But I would like to drive the thing until then. What are some of your opinions?