pretty simple just unscrew 3 or 4 screws off distributor cap and and take off...inside there will be this plastic rotor usually orange from factory...prone to disintegrating over the years.
Another good video you might wanna have a look at it before u decide to get a new distributor (might save a few buxs)....
http://www.youtube.com/watch?v=9K78XIhhjAQ
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