They don't make them like this anymore.
I bought this vehicle in 2003 and I am the second owner. Bought this thing with 117K now its at about 134K. Straight pipes out the back for that deep rumble and K&N direct intake. I just recently took it out of storage. It sat unused from 2006 to 2007 but its back and better than ever. Chris Hardtke and I fixed all the flaws and made it quite presentable. New sound all around with Pioneer speakers and 2 12's in the trunk. USB flash drive head unit and I'm good to go. Very quick. I have been on a few police ride alongs and I think this one is faster and quicker than the Crown Vic police package. I try to keep up on all the mechanical aspects and rust as well, but i don't drive it very much. The roads must be salt free and try to be dry before I even bother with it. My Sundance is my everyday car and close to my heart as well.
I have ground effects for it but I have mixed feelings about putting them back on or not. Otherwise handles very well and the 4.6L is very solid unlike the problemactic 3.8L they put in these cars as well. I'm always on the look out for nicer rims as well. Ground effects are for sale separately ($200).
I replace parts that wear out on this car such as shocks, sensors, and anything else that shows wear.
Giving that no one else destroys this car, because I know I won't, I'd say its good for at least 250K.
Pros: Very powerful, engine sounds deep and mean, turns some heads, soundsystem is at perfection, perfect gear ratio, interior is cozy and roomy with digital climate control, 8 way power seat
Cons: No Posi, sun roof iffy, hood should be built up a few more inches, paint on spoiler is chipping.