"Easy" is NOT the applicable term for the replacement of either the front or rear main crankshaft seals. Sorry.
To replace the front seal, you have to basically do all the work to remove the timing belt and then you also have to remove the crankshaft timing belt pulley to access the front seal. I use a drill and sheet metal screw into the seal's metal ring to pull the seal. This is a lot of labor to replace a $7.99 part. That is why we usually replace it during the timing belt change.
The rear seal is only accessible when the clutch has been removed. Wait until the clutch needs replacement before you worry about going after this one.
Put a plastic sheet under the car in the garage to catch the drips. Oil is cheap when you think about the cost of either of these jobs.
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Scott
1991, 252K 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,
Class II hitch, Silver award at the SHOklahoma Car Show