drew@INTERPORT.NET writes:

<< The trouble with doing this is that it leaves you quite
vulnerable in the event that you have a problem  with either
your transmission or differential in the future, as you will not be
able to obtaining spare units of the correct ratio on short notice. >>

True.  Weedle Engr. offers a spliced 4.57 091 pinion onto a
002 shaft for approx. $300 + core.  I would think that the opposite
could be done with the Syncro ring and pinions but I haven't
been into a front diff in quite a while and don't remember if this
type of fabrication could work.  Stock ratio options could be:
4.57, 4.83, 4.86 (stock Syncro), 5.38, 5.42, and 5.86.  While
these are stock ratios and fairly easy to come by if you did
have a failure you would be stuck until a new spliced ring and
pinion set could be made and shipped as Derek pointed out.
Sounds like a good idea though.

-Todd Hill
 VolksWerks Transaxles
 Olympia, WA