[FrenchToast]

The mounts are different because of the shape of the door where they mount.

The actual "flag" part, the mirrors and motors, etc. should be the same.

Beware what glass you get though. The backing plate changed for 85-86 (for both cars). It changed from a friction fit to a bayonet-style ring clamp. Your car should use the earlier style (unless it has been changed).

Additionally, in 1988 they changed the passenger mirror to convex. Before then they all are flat. (Convex ones have the "objects in mirror.." text). I'm pretty sure the actual glass shape is identical, so it should glue right into your old backing plate. After driving a modern car I find myself wanting the convex passenger side.