There were very few U code cars to begin with, and many fewer with the shaker option. That being said, I have seen 1 real one. It was the first U code Cuda I ever saw. It was unrestored and a little rough at the time, and this was more than 25 years ago, so I am assuming it is either in mopar heaven, or has been fully restored to better than new condition by now. I was kind of excited when I first saw it because at the time I was under the assumption that all Shaker cars were Hemis, and I was hoping to check out a real HemiCuda.