Here is a guy who has done this and he is selling the van at this moment.
http://communities.msn.com/VanT/shoebox.msnw?Page=1
Check it out!  I found this on www.vwvortex.com.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of JordanVw@AOL.COM
Sent: Friday, May 10, 2002 5:26 AM
To: vanagon@GERRY.VANAGON.COM
Subject: 1.8T inline 4 into a vanagon??????

ok, so Tiico can put a inline 2.0L 4cyl into a vanagon - any reason why a
1.8T cant go in there??
anyone tried it?
chris