Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Yes, it should be fine. i was wondering doing the same thing for my MacbookPro and use the case for my internal.BTW it was priced at 199 just a few days ago!
 
It worked! It was a bitch getting the Passport apart though. Once I got it apart I found out that I could have applied more force since the two plastic pieces are only held together by tabs (which look pretty tough).

I bought the 320GB Passport from the local Bestbuy for $179. Just finished installing OS X...now I'm transferring my old files from the now 120GB Passport.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.