Yes a PC drive will work fine with a few additions.
You need to find a 16Mhz clock and also require TOS 2.06 (although you may be able to run 3 or MultiTOS form a disk, not sure).
Try and do a search for for Atari Upgrades Hacks - therewas a really good site but I got my laptop stollen along with all my e-mail, link and web addresses.