First off, Welcome to SDD ! A REAL good place to get the information yer asking for.
Be sure you get the up-graded throw-out bearing assembly and clutch fork.
Just my opinion but shared by many here: The FORD OEM replacement clutch assembly is just plain WEAK. Look into an aftermarket assembly that includes a new Flywheel/Pressure plate and bigger better clutch plate.
Don't know how well equiped your shop or garage is but R&R'n a clutch on these things is a Big Job. The 7.3 is heavy and will need to be supported, the Tranny is heavy too and yul need a tranny jack.
Also, Be sure you check the in-put shaft bearing on the tranny for any out of spec play. Seems when the Throw-out Bearing goes, depending on how long it's been going south, it (can) wipe out the in-put shaft bearing too.
Haveing said all this: When I did mine, I bought my own Parts (whole LUK clutch assembly, w/flywheel) and had my FORD garage do the work. Needed a new In-put bearing (tranny tear down to do it) the whole thing, parts & labor was +/- $1600 bucks. Would'a been cheaper without the Tranny in-put bearing.
Joe