Yeah, driveshafts on a 2 door is a must on a 3" or higher lift. The might last you a little bit in order to save money, but dont put too much trust in them. We ran ours in our JK for about 3 weeks while custom shafts were made. Ours ran fine, but we did angle the pinion up for the new shaft, so that took some of the bad angle out of the stock shaft. It did vibrate like that though.
When we put in the new shafts, no problem.....
Again, let me know if you need any prices. I can package you together whatever you want (including shafts).