6300 question

[Douglas F. DeJulio]

I've got an old AT&T PC 6300.  The thing has two 360k 5" floppy
drives, but I remember reading that the floppy controller in this
machine could also do 720k floppies.  Well, somone near here is
selling 720k 3.5" floppy drives.  I'd like to get a few and put them
in my PC.  What do I need to do to do this?  Are the 3.5" drives
electrically similar to the 5" drives?  Do I need some strange
cabling?  Do I need a new controller?

I'm also interested in what sort of 5" drive I could use at 720k.  One
5" and one 3.5" might be better for me than two of either type.
-- 
Doug DeJulio
dd26 at andrew.cmu.edu