That's a good flywheel but pricey. You need an 8 bolt flywheel being a 2000 though. And that flywheel supports 10.5 and 11" clutches so upgrade to an 11" clutch. You don't need anything else to go up to an 11".
Exedy Mach 400 Mustang Clutch 7805 (Late 01-04 GT, Mach 1; 99-04 Cobra) - Free Shipping
Get that one. It comes with an alignment tool.
Besides that... fluid, a good lithium grease and a good 4 letter vocabulary.
edit: Also you need a new exhaust flange gasket for the passenger shorty header, you'll need a bunch of extensions to make a literally 3-4 foot
extension to get to the top bolts with the trans tilted down and you'll need an impact gun to get the flywheel off.
If you can, rent some lift time. If you are military or know anyone in the military, your local base/post should have a shop where you can rent a lift for $5/hr. If not... see if there are any shops around you that rent lift time. I would NOT recommend doing this on your back although people do it... Doing a trans is not really that hard, its just time consuming and you pretty much need a helper. I was able to do it in 3.5 hours last time from the time the car rolled up to the lift to the time it backed out.