For all the work- why not just swap a different housing? Seems like if that one cracked, it might have been defective from the get go. It shouldn't be too difficult to find one that you could swap in. If you do a lot of wheeling you could even swap one in that has the air locker.

1987 Raider, 346K miles and going strong -31" tires, otherwise stock.
http://tidbitsfortechs.com/
http://actionpcs.com <-- $39 remote PC repair, guaranteed.
How to include pictures in threads on 4x4wire (Youtube video)