When replacing any emission related electronics, stick with the same year, for specific calibrations, etc. Now, I'll throw one more curveball at ya. What month was your '96 made? Especially the 'Classic' model. Many were made up until December of '96, like our Classic, and have some '97 components. One way I tell the difference is to look at the windshield wiper arms. The newer arms on the older body are a sign that it was made late, and may have '97 components installed, and may have a different computer, unless, of course, yours is a later model.