Here's the info and where he got it done at, there good and bad news, it was done by Man-A-Fre Off-road Performance. Unfortunatly they are in Simi Valley. Now for the good news, it is really simple to fab it up, all they did was run an FJ-60 heater vent hose from the snorkel inside the fender to the EFI inlet, that's it.
Here is their # so you can call them and see if they remember doing this, he had it done in 2000, 805-578-8712 and they have a website too:
http://www.man-a-fre.com/default.htmThey're a Land-Cruiser specialty shop so they may remember a 4Runner even that long ago.