While it should work in theory, is it really worth it for an extra 160GB?
If you're lucky enough to manage to fit it and close the lid, you'll have a drive in there that sucks a hell of a lot more juice than recent models, makes more noise and generates a heck of a lot more heat!
My temporary 320GB Seagate sata drive is 10 degrees C hotter than my Spinpoint F4 when idling. For the extra space, it just doesn't seem worthwhile keeping it!
Then again, I guess now is a pretty terrible time to think about replacing it with a newer model, so no harm in giving it a try!