Yep,
The bell housing can be welded,if;
(A) You have in stock, a mig or tig welder
(B) You know someone with a mig or tig welder.
(C) You pay a welder to do the job.
That's it!
However I would suggest taking it to a welding shop and have them look
at it first, to determine whether or not the area in question, is
accessible.
If you have -0- welding skills, it would be advisable to let a skilled
craftsman do the job.
Welding aluminum is tricky.

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Terry 85 GL