Going to have to agree with the above. Too much hassle for too little benefit.
Brucey did a similar mod on his Subaru Outback years ago. His mileage benefit was quite real, but in the end not worth the effort he said. He parted out the system about a year later.
More info here:
http://ecomodder.com/forum/showthrea...ack-13932.html
And a few pics:
