Here is what I did on my 95 3.0 Caravanan.
It is not quite as dramatic as the Daytona struts and coils method, but you still have less wheel gap, much improved handling, and you will have more adequate ground clearance under the cross member.
It never either bottoms or tops out, front or rear, if you use this method.
The front:
Use Caravan struts and 3.0 Daytona coils, instead of using both Daytona struts
and Daytona coils. This way you still have good travel and ground clearance, and you get a 1.5 inch drop. Best of both worlds.
I put on new Koni red adjustable Caravan struts, and I put on
new heavy duty "cargo" PR coils for
3.0 Daytona with AC. The coils really didn't cost much. I got them from Parts America. Koni red adjustable struts are expensive. They are well worth the money though.
I highly recommend installing both new coils and new struts.
This setup works just like lowering springs, and it lowered the front by 1.5 inches. That doesn't sound like much, but 1.5 inches made a real difference in both function and appearance. I still have adequate travel, and while slightly softer, the front is not as soft as lowering springs usually are. They made the front of my van firmer than it was on the OE struts and coils.
The rear:
I recommend that you replace that nivomat single leaf with a multi leaf. You can get them from a good recycler. Or you can buy new ones, recommended, because they really aren't that much. Rock Auto has them at a good price.
Then you can do this.
I had the typical multi leaf, 5 leaves, springs in the rear. I took out the two lower 'load assist leaves', and that dropped the rear, 4 inches in my case, so it matched the front. I also put on Monroe Sens A Track shocks for Caravans. Pretty good shocks IMO. I like them better than the KYBs I used to have, and they were cheaper too.
You may, or may not, need to do the following also.
I also installed an
Air Lift 1000 Load Assist rear spring kit, for when I carry extra weight or I want the rear extra firm. The only down side is that you have to top up the pressure, every couple of weeks, to keep a minimum of 10lbs in them. If you don't they wil wear out prematurely. I am getting their on board pump with pressure sensors soon.
I really like the results I got using this lowering method. Handling, especially cornering, has greatly improved, and appearance has also improved quite a bit.
Hope this helps.