Ken,
Thanks for the tip on the mirror size and sunvisors. That's a great 
piece of advise.

I just found that some of the higher-end GPSs have backup camera 
support and perhaps a downward view might relieve the brightness 
problem. I'll let you know what I find out.

Cheers,
Harry

On 2013-06-22 10:43, kenneth wilford (Van-Again) wrote:
> Harry, I have done this.  I installed the Yada BT50326F.  You can see
> what it looks like here:
> http://www.amazon.com/Yada-BT50326F-1-Wireless-Back-Up-Bluetooth/dp/B0081L8SWM/ref=pd_sxp_f_pt
> [1]
> 
> The only two real problems with it are that the mirror itself is a
> bit bigger than the stock Vanagon mirror.  This makes the sunvisors
> hit on either side once you install the mirror over your old one.  It
> would be nice to try to find one that has a mirror unit that is
> similar in length to the Vanagon to avoid this.
>