Not pure plug 'n play.
It can be made to work though ..sort of.

2 main issues I think..
one is your van and engine have a Dynamic Oil Pressure System ( see
Bentley ) with two oil pressure switches.
An 85 only has one.
Unless you switch the DOPS circuit over from the 90 instrument cluster to
the 85 instrument cluster ..
you would loose the dynamic OP system ..........which checks OP for low rpm,
and high rpm.

the other issue is the position of wires at T14, the main instrument cluster
plug.
It opens up though ......and you can move the wires around in it .
using the wiring diagrams in Bentley.

I think that's mainly it.
Scott
www.turbovans.com

----- Original Message -----
From: "Mervyn Readman" <themervino@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, September 29, 2011 3:55 PM
Subject: instrument panel

> Anyone know if a 1985 instrument panel with a tach will work with a 1990
> instrument panel also with tach. Thanks  Merv