Thanks for the info it was helpful.  I also had antifreeze leaking from the
bellhousing area of my 95 Aerostar.  It was leaking such that as I added
water to the radiator, it was dripping out of the area of the bellhousing
when the van was not even running.  The funny thing is that it just
developed overnight.  Had no leaks before and then BAM, antifreexe pouring
all over the place.  

Just to be sure it was the freeze plug, I was able to see where the water
level dropped off to in the radiator and it seemed to be even with where
the freeze plugs on the back of the block would be located.  I wanted to
be sure before I jumped into this project.  

Well, I'm happy to say, about 12 hours later over a couple of days of
dropping the trans, exhaust, lines and cables and a few bucks for some
parts and tools, and some banged up knuckles, I was able to get to the bad
freeze plug, knock it out and put a new set in. This is not an easy job and
really not much room to work with at least for me on the garage floor but
way better then paying upwards to $1000 for a shop to do it.  Actually I
wouldn't pay that much and would have gotten another ride.

I'd recommend that you use prematex to help seal around the replacement
plugs and also pressure check the system after you put the plug in before
bolting everythin back up to make sure there are no leaks.  

So far I've got about 5 hours of driving with no leaks.  My only concern
is what will be next...  The antifreeze was rust brown and that is from
when I last changed the antifreeze about 1-1/2 to 2 years ago when the
radiator was replaced.  I'll be changing it more frequently and keeping an
eye on the cooling system overall.  At least I'm back up and running and
for only about a $10 repair...    Feeling pretty good right about now!!!