I'm going to replace the whole cast iron assembly and while I could re-use the old pulley, I'm going to install a new one for a 6. 7.
Why would you replace the assembly when all you need is the bearing? The complete casting was like $475 delaer price the last time I checked.
All you need is the fan pulley for the 6. 7 and you should be fine. I think the mount is the same.