I'm thinking it won't fit because of the header diff and the path it takes under the car. Also, the tone is gorgeous but would probably sound brash because of the tuning diff on the other exhaust pieces.
But you could try and custom make your own exhaust tubing.
I haven't looked at the 305Z exhaust, but the chances of it fiting over the rear suspenson, around the gas tank, and having it match up with the cats is very, VERY slim. Just go to a good muffler shop with a mandrel bender, and have them fab one up for you. It will be about $300 (guessing), but will be alot less hassle.
Most muffler shops cannot mandrel bend. They will use pre-bent mandrel piping and only custom bend slightly in certain situations where they can't use the pre-bend stuff. Its all good though, long as there are no huge issues where the pipe bends are.
I dont know to me is sounds like to much of a hassle to do the swap and i sure dont feel like dropping 300 to have them make me an exhaust when i can make my own. im currently am making a custom dual exhaust system for my 93 tuarus and itll cost me less about 100 to do it from the cats back. im currently doing it from the rear suspension arm im making my own y pipe by using to 45 degree pieces and welding them together and from there im going to run it around the wheel well and out the back. im not using any mufflers just some chrome 3 inch tips. later on im going to replace the resonater with a glass pack muffler.
If any one knows where i can get a y pipe that will fit the taurus exhaust wiht the correct bends in it plz let me know. ill get some pics as soon as i get done