Mid 89 they made the change to CE2 from CE1. It was also during 86 that the hydro lifters were introduced. I'm not sure if the heated fuel filter was a Canadian option or done by year. Beyond that there isn't a whole lot different, except looks of courseThe "stupid triangle windows" AKA small doors can be swapped with the later ones, as can everything else. Power steering is a power robber as far as I am concerned. I can't wait to rip mine out and put in some good manual steering.The steering wheels are also swappable, but you need the big spine adapter, which is simply pressed onto the later steering column splines if you want to use a later wheel on an earlier car
Power steering is nice. It doesn't rob much power if your going in a straight line. Which is usually when you want power. I like all the power goodies. I have owned too many clunkers without them. I think power heated seats are overkill though. So the 85 to 92 have the same body just minor cosmetic differences?
I've heard 92 was a bad year as well, but I don't really see it. Of course I've only owned one of them