Sure you can.  Maybe not legally.
Even so, you don't want to.
I would recommend even a WBX over an air cooled.
AC motors don't last in heavy vw's.

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
> Of jmatchet
> Sent: Friday, July 02, 1999 11:18 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Can I put an aircooled engine in a water cooled 91?
>
>
> I had the question asked of me tonite, as my friend was pulling
> off my head
> with
> cylinders attached.
>
>
>
> -----Original Message-----
> From: mike <mayfly95@PAONLINE.COM>
> To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
> Date: Friday, July 02, 1999 10:18 PM
> Subject: Re: Fwd: CamperVW
>
>
> >Check out http://www.enter.net/~bloss/vw/vwshops/
> >
> >and my personal bias would be Todd at volkswerks transaxles, especially
> >with a synchro and even with the shipping to the left coast.
> >
> >My personal experience with trannies(especially 4x4's) has led me to the
> >experts, those that do this "particular" job more then once a decade,
> >year.
> >
> >Keep in mind that the synchro trans is fairly rare and few shops have
> >experience dealing with their idio"synchro"sies!  lol
> >
> >peace
> >
> >mike
> >87 westy
> >
> >Vicki Derrer wrote:
> >>
> >> In a message dated 7/2/99 1:52:05 PM EST,
> dliberal@bellsouth.net writes:
> >>
> >> <<
> >>  Greetings,
> >>
> >>  I am in desperate need of help.  I own a 1990 Vanagon (syncro) Camper
> >>  and I am in need of someone to work on my transmission.
> >>
> >>  The local VW dealership wants $3,900 for a rebuilt transmission plus
> >>  $1,500 for labor.  I can't afford that price for a
> transmission. Do you
> >>  know anyone on the east cost of the U.S (Florida to Virginia or
> >>  whatever) who can work on my Vanagon transmission?
> >>
> >>  Please, any help would be greatly appreciated.
> >>
> >>  I live in Ft. Lauderdale but moving to South Carolina in the middle of
> >>  July.  I will travel almost anywhere to get the transmission fixed.
> >>
> >>  David R. Stack
> >>
> >>   >>
> >>
> >>
> -----------------------------------------------------------------------
> -
> >>
> >> Subject: CamperVW
> >> Date: Fri, 02 Jul 1999 14:51:04 -0400
> >> From: David Stack <dliberal@bellsouth.net>
> >> To: Vicary2U@AOL.com
> >>
> >> Greetings,
> >>
> >> I am in desperate need of help.  I own a 1990 Vanagon (syncro) Camper
> >> and I am in need of someone to work on my transmission.
> >>
> >> The local VW dealership wants $3,900 for a rebuilt transmission plus
> >> $1,500 for labor.  I can't afford that price for a transmission. Do you
> >> know anyone on the east cost of the U.S (Florida to Virginia or
> >> whatever) who can work on my Vanagon transmission?
> >>
> >> Please, any help would be greatly appreciated.
> >>
> >> I live in Ft. Lauderdale but moving to South Carolina in the middle of
> >> July.  I will travel almost anywhere to get the transmission fixed.
> >>
> >> David R. Stack
> >
>