Hallo, i want to swap in a 14bolt ff and a dana 60 axle in my stock 1979 k5. I checked out that the U-joint at the stock front driveshaft works with the Dana 60 yoke. But the problem i have is, the 14bolt ff yoke will not match the stock rear driveshaft U-joint. the 14 bolt yoke is bigger. I figured out that there is a special U-joint available wich fits the stock driveshaft at the one hand and the bigger 14 bolt ff on the other Hand at the same time. I don´t want to cut and weld on my stock driveshaft. Which company makes and sells these special U-joints ?? TRW Federal Mogul Napco or something else?