Hi I took the propellershaft out of the car, and got a better view. The U-joint is a Detroit #72625. The 4 boltholes in the bearingcups are for connecting the shaft to the rearaxel. There are no U-bolts used on this type of rear end. For about 10 years ago, I found a Chrysler look alike propellershaft in a '68 falcon partscar a friend bought. I have kept this at my garageattic since then. This propellershaft is smaller than the one on the C, but the U-joint is the same Detroit #72625. But with 4 round "normal" bearingcups. I swiched this U-joint over to the C's shaft, and used the original "weird look"bearingcups, these bearings seems ok. Yes, I know this is not the best way to repair it. But it gives me time to find the correct parts, the U-joint is tighter, and I can move the car without shaking it to pieces. Thank you for trying to help me. Oddvin Skråmestø Norway