Originally Posted by De Nub 03gt

What would recommend me doing first set up wise and everything?

Originally Posted by UPRSharad

I'd recommend these subframe connectors:
http://www.uprproducts.com/mustang-f...onnectors.html

These shocks and struts:

http://www.uprproducts.com/strange-m...-strut-87.html
http://www.uprproducts.com/strange-m...-shock-79.html

*note* These are Fox length struts & shocks, which will work better on your lowered 2003 Mustang

And these springs:
http://www.uprproducts.com/mustang-e...prings-v8.html

^^I ran this setup on my 2004 GT and it worked quite well, without destroying my bank account. I'd definitely recommend this type of setup.