It is a fairly simple change. If you don't have a Chilton's (or other) manual, you can peak at one in the rack at the store. You have to remove the plastic panel over the radiator to access the fan and shroud assembly, the expansion bottle, the crash sensor, fuel pump relay module and the upper radiator mounting brackets. Nothing magic, just see what is in the way and carefully remove it.
The lowest cost source I have found is RockAuto.com at $115.43 (just verified). You can get them at many local auto stores (1-2 day order, usually) for around $140-$160.
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Scott
1991, 254K miles, glass hood, police grill, SVO shifter, Catz fogs,
K&N, 73mm MAF, Superchip, PP Y-pipe, Borla cat-back, 190 lph pump
Eibach/Tokico/polyurethane, SHO Shop front & rear strut braces,
16x7.5" Moda R1, 225/55ZR16 Bridgestone RE730, -1 deg camber x 4,
6 disc CD, Class II hitch, Silver award at SHOklahoma Car Show