[Speedbumpauto]

You can do a modified notch to that crossmember and box the bottom of it out far enough on the legs to make it at least as strong as it was and gain 1 1/2" or so of clearance, by my eye. I wouldn't box it all the way out to the frame so that the ends have a little bit of "twistability" where they attach. Like the others have said, unbolt the rear shackles and jack the diff up as far as it will go to get your measurments.