Re: 2004 taurus suspension swap????
If you're looking for an upgrade to your suspension, I'd look at the SHO. The rear of a Mustang has to support the car and assist in the transference of torque, where the Taurus just supports the car and keeps the tires in the road. The front end of the Mustang stabilizes the steering, but it does not have to deal with controlling of the torque like the 'Stang. If you chose to, you could turn the Taurus into a rear wheel drive, but there's a whole bunch of mods you'll need to consider.
Chewing on asphalt and drinking dinosaur wine