The post above me doesn't count towards your truck......completely different front suspension.
The issue with mustang wheels on a 98+ ranger, is the front wheel hub. You might need to run a small spacer(7/16" or so) to make the hole in the wheel clear the hub. What the issue is, is that the hole in the wheel is not quite big enough to clear the ranger hub on 2wd's....not too sure on 4x4's. For some odd reason, i remember test fitting my little brother's Cobra wheels on my 4x4.....don't remember bolting them on though.
'01 XLT disguised as a '03 Fx4 Level II
Big. Loud. Slow. Bright.