Depends on what year you are needing it for. Chevysofthe40s has three different ones, all with three different dimensions, depending on the year span. I assume you ordered/received the correct year span. From what I see, 1940-1950 used a certain size, 1951-1954 used another size, and those earlier than 1940 used another size. Most probably the OD of the bushing being different. CP shows the same thing. As long as you got the one for your year truck, it should fit. Mine is a 1951, so I get to wait until they get mine in.
Mike