Stalker front end will be fine with stock sideskirts but I would recommend looking for a takeoff 99-01 cobra front end, 03-04 cobra front end, or saleen front end as a used one can be had for cheaper than the stalker and will most likely look better.
2003 Redfire V6,
Show: Smoked headlights/foglights/tailights/reflectors, cobra front bumper, gt rear bumper, rear decklid and lower valence blackout, black mustang letters, 5% rear tint, front 15%, black 98 Cobra rims front, 95 Cobra R rear black with chrome lip, black hoodscoop and spoiler,
Go: CAI, True Duals with flowmaster super 44's, Bama Tune, 94/95 5.0 OEM strut tower brace, soon a windstar intake
2004 Blue F150 Fx4