Well yes, it will fit because both DINs are standard size. But think about it... The Empeg is a pull-out stereo. And the Mustang's shifter will get in the way of pulling it out. If you have an automatic, it's be even worse, you'd have to put your car in gear to pull out your Empeg -- that's not where you wanna be. Put your Empeg in the top DIN, and put any other components (most likely a head unit), in the bottom DIN. That's what I did in my 99 Stang and it's a great setup.

Besides, the Empeg belongs on top of all other car stereo components. :)

-Tony
MkII #554