The best part about this is that some Mustangs were recalled for the gasket leaking. If your car has never had the work done to replace it, you may be able to get the dealer to do it for free. I perfer to do my own maintenance so I didn't take my 97 mustang in.
I am in the process of replacing the timing cover gasket. The reason the manual calls for removing the fan is because the Power Steering pump pulley must be removed with a puller. I got mine at Advance Store for about $35.00. With the Fan in place there is not sufficent clearance for the puller. Also I am ording the Tool to replace the Cam Position Sensor housing I found one for
$27.30. The gasket kit cost about $35.00 as well. That should do it for the special stuff. I had to remove the Alternator, Power Steering pump, both radiator hoses, the Coil Pack the Fan and plastic cover on the front top just under the front of the hood. I will probably finish the job tomorrow. I had some trouble with water pump bolts and I had to drop the oil pan to get the timing cover off. Total job will take about 10 hours. By the way, I you can get the cover off and back on with out turning the crankshaft you are a better mechanic than me. I suggest getting the tool or marking the housing where it meets the block and the rotator under the Cam Position Sensor. I did neither and so I will have to buy the Tool.