The sliding door for '85~'91 is a different size from the '80~'84 as well as
having completely different latching mechanisms.  They are not
interchangeable.

Mike
'84 GL 7 pass
'85 GL Westy

>I understand several changes were made in the sliding door and
> mechanism for the '85 model year, and the later style is much easier to
> operate. Has anyone tried retrofitting a late style door on an '80-84 van?
> Is
> it just the hardware that is different, or the entire door? (I know the
> part
> where the outer handle attached is different, but am not sure what else
> might be.)
> My '82 door is fairly rough, so if I'm going to look for a replacement,
> I'd like
> to consider an upgrade if possible...
>
> --
> Shawn Wright
> I.T. Manager
> Shawnigan Lake School