I've read that '97s already have the factory wiring, then heard not all do. Not yet sure if mine does or not but if it does I'll be wanting to get all the gear that's needed, and then someone to install it because I'd rather not risk an amateur mistake on something that controls my throttle ;)
Failing that I'll just go with an after market unit. But I need a cruise control to make sure I don't exceed the speed limit. My work route is well policed.