You should be able to get those out with an ez out. You won't have to re tap the holes that way. Drill the center of the broken bolts, put the ez out in and turn to loosen. The tool is designed to run itself in tighter when you turn in the normal direction to loosen a bolt. I've had to use one several times. Most recently when one of the bolts for the rear diff snapped. By the way, don't lift the rear of your truck by jacking under the diff.