Yes but the 99-04 rear fenders are wider too so take that into account. Just measure how much spacer you need from where you want it to be, not really too hard.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.