I assume he means the hatch.
92+ got two additional bumpers on the sides of the hatch and there was a slight sheetmetal revision to mount them. They also got the upgraded latch, which I highly recommend over the 91-older style.
The wiring changed over the years, so the harnesses are year specific.
But no major changes that would prevent an 87-93 hatch from going on an '86. I recommend reusing your wiring unless you want to change to the 92+ style latch. Then some wiring changes need to be made