Re: What body piece is this?
Yah that's the front rocker piece...you could probably find one in decent shape on a wrecked v6, GT, Mach 1, or 99/01 Cobra.
Looking at it you might be able to pull it back out flush with the fender and other rocker panel.
12 Black GT500 SVT PP l 2.6 Pulley/Idler l Airaid l o/r X l 305 NT555R's l Recaros l
04 Azure Blue Mach 1 / 03 Sonic Blue 3.8 / 14 Sterling Grey F150 FX4 402A 5.0 / 11 GT500 R.I.P.