use automatic trans fluid (yes you heard that right)
if you have pulled the trans b4, then you are set. Yank the center column tray surrounding the shifter, remove the shifter, pull the h-pipe off, yank the driveshaft , the speedo cable, the o2 sensors, and any other wires connected to the trans. support the trans and yank the x member, pull the 4 bolts connecting the trans to the bell housing, the bell housing and trans will come apart as two pieces, after the 4 bolts come out, yank the trans from the bell
yank the little bolt off connecting the housing that houses the clutch cable, disc the clutch cable. yank all the bell housing bolts, and pull the bell.
you will see the clutch there, undue the bolts that hold the pressure plate on, and the pressure plate and clutch fall off, watch it, real ******* heavy, will knock you unconsciuos if you are on your back and it falls on your head, maybe even kill you. while you are there, DO NOT SLACK ON RESURFACING THE FLYWHEEL. the flywheel comes off with just a few bolts, pull those off and get flywheel surfaced, (kinda like a brake rotor), i skipped this the first time, and it never grabbed right, and wore prematurely. ALso while you are down there, replace the rear main seal in the crank. They might sell the tool to pull it out, but we were able to simply pry it out CAREFULLY using common tools, only takes you five seconds and five bucks to save you months of headache.
take you clutch allignment tool that came with the clutch, if it didn't, goto autozone and ask for one. after you get your rear main seal back on, and your flywheel properly torqued on, put your disc on, paying SPECIAL attn which side goes toward the engine, mate it up to the flywheel, and put the pressure plate on at the same time, and use the alignment tool in the center of the pressure plate, this will go through the p-plate and clutch disc, and in the crank, and line everything up so you can rebolt the p-plate back on.
everything from there is simple reversal.
Remember, if you clutch feels out of adjustment, the stock way to adjust a mustang clutch is to pull up on the clutch pedal, then depress it, this will "self adjust it" if it still feels funky, stop everything and get an adjustable setup.
Good luck, email
v8only@yahoo.com if you have any more questions.