Gentlemen,
My two cents worth...
Although there are several ways to repair this crack I, think that trying to repair the cracked head is not the best path. In my experience I have found that a crack, in general, results from a head that is warped.
I would bite the bullet and buy a used head, have it magnafluxed, have it milled and do a valve job... put it on and toss the old one. Or buy a new/remanufactured head.
It seems that whether you go for the 'salvage the cracked one', buy used, or new one, it's going to cost you about a K-buck plus or minus a couple hundred.