Jon:

Kim's idea is a good one--check rear CVs.

If you do want to drop the driveshaft ("propshaft")
it is not hard.  Jack up one side so both front and
rear wheels turn, then start working on the bolt/nuts
(4 each flange) one at a time.  Two box wrenches work
best.  I don't have a socket that will fit--bad flange
design, I say.

Bentley say to loosen the front diff mount bolts.
If your rubber donut is very hard, you may have to, to
get enough play between the flanges.  I didn't have to;
with a spline propshaft, there is expansion/contraction
built-in.

Your Syncro will drive fine without the propshaft--
probably smoother than you have ever experienced.

[BTW--you don't have to mark/remember the orientation
of the flanges, and you can reuse the nuts/bolts.]

I have a brand-new GoWesty propshaft that I would sell.
I'm in Boulder.  P-mail me.

Richard