These BA6 units came off aircooled Vanaogons.I think most were installed
in aircooleds.If you are looking for one,best to checkout all the air
cooled Vanagons you can find.Even those currently uses as chicken coops.
They wont bite.I found both of mine in the same junkyard,in Hagerstown
Maryland. They has been sitting 25 feet apart for 10 years.Nobody cared to
look.

I think they will fit watercooled with miminal changes. First, a check
valve for the main heat tube that runs from the inside heater box, to the
rear vent,under the Vanagon. This will keep hot air made in the heater
box, from going to the engine compartment.Second is relocating the blower
fan. I think the area where the coolant pipes and PS lines are,is too
busy.fMaybe thedrivers side. Most of the other changes were upgrades to
the existing unit .