Not sure if this has been covered in another thread, I did a search and could not find anything. I've been working on a basket case 1971 CJ5 for about 8 months now. In the process of getting everything in good working order, I decided to replace all the u-joints, front and back. I managed the rear shaft without any trouble. Moving on to the front I got careless with my hydraulic press and messed-up (bent) the front driveshaft yoke. Crap!! I searched around online for a new shaft that fit my Dana 27 axle and Dana 18 transfer case, but did not have much luck. The problem I found was the u-joints for the original driveshaft are considered obsolete. So the best way to solve the problem (other than to not bend your original driveshaft in the first place!) is to upgrade the driveshaft to one that uses the very common 1310 u-joint. But that means you also have to upgrade the yokes on the transfer case and axle. Ok, fine. There is a yoke made by Dana to use on the transfer case (#2-4-2821) that up grades to a 1310 joint. But I could not find a yoke to fit the axle and a 1310 joint. Crap! I finally found Gabe at Northern Drivetrain in Wisconsin (1-866-907-8492). He was very helpful and custom made a yoke to fit the Dana 27 and accept a 1310 joint. So now I have a stronger front driveshaft and a more common 1310 u-joint, all thanks to me screwing up the original shaft and the valuable help from Gabe at Northern Drivetrain. So I just wanted to post this information in case someone else ran into this same problem or if you simply want to upgrade your front u-joints and driveshaft. Gabe said now that he has made a yoke for me, he can make one for anyone because he has all the proper specs. I think the part # is 2-4-2291. Thanks again to Gabe at Northern Drivetrain!