Hi Fritz, Yes, it's hard to see the difference. The one on the left is the ball bearing type. There are bearings at 12 o'clock and one at 8 o'clock. The one at 4 o'clock is missing and that's why I had to replace the breaker plate. The photo on the right is the molded type bearing and you can see one installed at the top left and one at the bottom and there is one more that I hadn't installed when I took the photo. With the new breaker plate and molded bearings the car is running fine now. Well, I say that but about 10 years ago I installed an Edmunds dual intake manifold and then parked th