ok, so it's the same as in my 2000... you can get away with most single DIN receivers with an adapter to keep it looking clean. Although this will leave you with a bit of an eye-sore underneath... for that, you can buy a stereo dash delete kit so you won't have that old wonky non-functional stock CD player sitting under your brand new deck.
You can pull it out & replace it with a delete kit for a much cleaner look... here's one I found on Amazon & another on Crutchfield. Either will do the trick.
Amazon.com: METRA Ltd 88-00-9000 Universal Radio Install Kit: Electronics http://www.crutchfield.com/p_120889000/Dash-Pocket.html
Also, to help determine which receivers will fit in your vehicle, enter your vehicle info on Crutchfield & their search engine will show you all of the decks that will fit in your
stang. This is a helpful tool for researching (even if you buy the deck elsewhere).
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Sexy Noir
LUCILLE: Noir 2000 5spd V6 Convertible / Roush Stage 1 body kit & dual Magnaflow side exhaust + X-Pipe / Roush lowering Springs / Roush Light Bar / Roush White Performance Guages / Roush Billet Pedals / Cloth rag-top (who needs vinyl...) / Saleen Speedster Tonneau / Billet interior / BBK CAI / Zenetti Stella Wheels 20x9.5 (Front) 20x10 (Rear) / Cobra-R Wheels 17x9 (Front) 17x10 (Rear)* [in the garage]