i would not suggest trying to weld that back together, call ford and get a replacement and weld a new one in the old ones place. when it comes to the rear suspension it needs to be perfect to make sure the rear axle is where it needs to be. definately let a qualified shop do the repair. if ford wont sell the part seperately from the rail, go to ur local junkyard and cut it off one. u do not want to repair metal that is ripped that bad. im an ase master certified and i-car certified collision tech and welder, so trust me on this.