I get the feeling you may want to do this yourself.  However, there is a good one one with all the engineering done.  Look on the Samba for ads by tencentlife.  He offers a great cooler at a reasonable price, and it comes with very detailed instructions and all the parts needed.  I have one on my camper, and it made a significant difference on long drives at high ambient temperature.  mcneely

---- David Moyal <moyald@GMAIL.COM> wrote:
> Vanagonanauts: Checking to see if anyone has experience mounting an oil
> cooler in the right (passenger side) air scoop.
> Model is an '83 Westy, came with a 1.5 NA diesel, now a 1.9 AAZ TD. I'm
> interested in hose connections, routing, oil cooler model and vendor.
> Thanks much, David

--
David McNeely