Rod bearings are the same as small block, either 2.0" or 2.1". They are packaged in different quantities. I can see in the future that we may have to buy a V8 set just from a packaging thing. I'm not sure how the mains work out. There wouldn't be enough. About 90% of all cam bearings used in the US and Canada are made by Dura Bond no matter what is printed on the box.