Well to also be a pain the 429-460 distributors fit the clevelands also. As before ford classified their engines in series classification not size. Maybe because they had so many over the years. Chevs were made bigger endlessly over the years so big and small block (with only a few exceptions like the 400 as it could be either) covered it pretty adequately. I've also seen arguments start over the FE's being called big blocks on this forum even though they are a serious lump of iron.