I just put a head unit from a 2000 Jetta into our Syncro last night.  Fits like
a glove, and all you have to do is add one more constant power, and even the
plugs snap right in.  You need a small (<$10) adaptor for the antenna.  I'm
getting the cord for an aftermarket CD changer, and am going to run a Panasonic
8 disc changer as well.  The van already had 5-1/2" Sony speakers in the door.
 I jsut have to get the radio code from the guy who gave me the radio (he gave
me his key code instead of radio code - D'OH!) and away we go.

Cost of head unit: free (horse trading for some stuff of mine).  Cost of antenna
adaptor: free.  Cost of extra wire:  free.  Cost of CD changer and the adaptor
for it - about $350 CDN.

Cheers,
Keith Adams
Calgary, AB, CA
86 Westy "Roxy" || 87 Syncro "Hugh"