You might be able to spread that yoke back out enough to make it work by using a 3/4"(20mm) fine thread bolt and nut, or bigger if you have it. Put a couple of pieces of flat stock plate over the holes where the U joint would go and cut the bolt so it it just long enough to fit between the metal plates on the inside of the yoke. Put the nut on the bolt past the end of the bolt threads so the bolt/nut will fit inbetween the metal plates inside the yoke. Then, with two wrenches, start turning the nut like you're taking it off the bolt. The mechanical advantage of the threads acts like a vise in reverse. It takes a little manuvering around and sometimes two people(four hands) but you can spread that yoke back out a little. When you get it spread out a little bit more than the minimum you need, heat it up with a propane torch or other heat source. Don't get it red hot but get it hot throughly and let it cool. This has worked for me before. If you find you need slightly more room for the joint, you can also VERY CAREFULLY use a belt sander to sand the lock rings to about 1/2 thier thickness and they will still install and work. I've learned this stuff because I have been in your situation when learning the in's and out's of U joints. It can be fixed....and....if you mess it up trying, it was already junk when you started.
