Welcome to FTE and nice looking Ex.

we can get your excursion suspension all sorted out easy enough, no big deal.

but first we need some measurements and pic to determine what was done and what needs changing.

lets start off with the basic ride height measurement.

parking on level ground with no trailer or payload, Measure all 4 wheels from the center of the hub to the bottom of the fender arc. Post those measurments up for us.

picture wise we need a clear picture of

1. Front leaf springs, best pic is from under the vehicle shooting towards the inside of the tire.
2. Rear leaf springs same thing but also need to make sure we can see the loacation where the axle attaches to the leaf spring.

While you are out getting measurments and pics, here is a little background on the Ex and suspension 101

as I am sure you know the Ex was built on the F250 superduty platform but since it was targeted to suberbia soccer nonsmoking for decided it needed to fit into a standard height garage door and built the Ex lower, they accomplished this by using diffrent leaf springs, The F250 has 8” off suspension travel and the Ex only has 5.5”

while that is fine and dandy when they are new all springs sag over time and when your springs sag 1” now the front axle is almost riding on the frame. This causes many issues but the biggest issue is it changes the front alignment geometry and the result is many Exursions wander when driving down a flat straight road because the sagged springs have reduced the caster alignment to below acceptable settings. The other big problem is the suspension bottoms out easily since it sits almost on the frame with sagged springs.

the fix to that would be to replace the stock leaf springs fairly often OR switch to the F250 springs which have more travel and a taller ride height. This gives a margin of error and enough suspension travel even when the springs are sagged.

The downside of this “fix” is your excursion no longer fits in the garage because of your “lift kit “
the upside is you don’t have to replace the front leaf springs constantly and your handeling stays consistant even as the taller springs sag.

Dual shocks, ya they are kinda dumb and not really needed for a street driven truck. to add insult to injury whom ever installed yours looks to have a used a pair of finger nail clippers to trim your inner fender well leaving you with a hacked looking setup. However, if your setup ride quality is acceptable then consider leaving it alone.

The fix is easy, take off the dual shock bracket and reinstall a stock mount. Then get new inner fender liners.
dealer cost on the stock upper shock mount is about $250 each or readily used for about $50
OR
use the double shock mount you have and just mount 1 shock. You will need new shocks though as dual shocks are valved diffrent internally, if you just took one off your ride would be very bouncy.

To actually lower your ride height to stock height we need to see what has what has been done to your leaf springs to know what needs to Ben undone

The front is 1” over factory ride height. To lower it you will have to buy new front leaf springs.

the rear is sitting at factory ride height but they installed aftermarket spring with a huge overload spring and removed the bump stop and anti wrap bar. Looks like they also installed a “helper spring” in the form of a RAS”

the ras RAS is that goofy looking device that sits onto of the leaf springs and hooks to the rear shackle.

Your Excursion doesn’t have coilover shocks or even a coil spring suspension, if you really want them there are conversions available but the excursion uses leaf springs. To change ride height you need to change leafs in the front and blocks and or leafs in the back. It is easily doable and a popular modification around here.