On a related note, I found an interesting note about wind noise reduction on this page where the 88 and up front door sealing improvements are discussed (the added seals and the relocation of door vent to the plastic bit on rear side windows). It is the blocking of the open lower end of the A pillar with a bit of foam.

http://www.t3-infos.de/t3-infos_d.html#wgummis

partial text translation:

Wind noise package

from model year 1988, the bus-standard versions vergebaut a wind noise package. For the cluster models, the wind noise as more equipment package (M 219) was offered. The wind noise package includes: 

        � Profile seal with guide rail between the front door and the body is bolted to the A-pillar
        � Rubber lip on the front, sloping edge of Fahrer-/Beifahrert�r is glued
        � Foam cushion bottom of the A-pillars
        � Relocation of forced ventilation of the Fahrer-/Beifahrert�r in the window openings of the rear side windows

alistair

On 2012-04-19, at 12:36 PM, george jannini wrote:

>   Fresh air?  Westy or non Westy?
> 
> 
>   If Westy, it is fairly easy to get fresh air on yer feets.  There
> is no sealing diaphragm on a Westy's A pillar air channel and when my
> left side started getting drafty, I had a brainstorm.
> 
>   First I blocked off the fresh air to the right rear side by sealing
> the air duct at the back of the passenger side door.
> 
>   Next, you want to remove the blocking foam from inside the driver's
> side A pillar because it probably hasn't all disintegrated yet.
> 
>   Then create a foam dam that will channel the air that is squeezing
> up past the dashboard down onto your feet.
> 
> George/ATL