well, I ground down the crack and welded it up with an arc welder. It took with no problems, it doesn't really matter how strong it is since this driveshaft is getting trashed after I install my 14 bolt and 4" lift. I'm going to get a custom alu driveshaft with a 1330 joint at the front and 1350 joint at the rear and then I'm going to convert my np203's 1310 output yoke to a 1330 output yoke. This welded yoke should hold for a little while.