depending on how horrific that crack is, you can take it to a machine shop, have them brush it, and tig it back together...Had to have that done to a customer's F250...The bellhousing split on the passenger side, 3 inches back, and the cracked portion was large enough to span 2 bellhousing bolts...

a good tig welder should be able to put it back as good or better than it used to be.