If you want to reach the 5.0 HP, get the 5.0, probably with the ecoboost it will be harder for that engine to reach that HP level with mods, and the longevity of your engine will have a shorter life than of the 5.0 with minimal mods.
2011 Mustang GT Premium, Brembo, 3.73 & Std. transmission, Steeda Sport springs & KONI STRT. GT500 strut mounts, 275/40R19 Michelin Pilot Super Sport, HAWK HPS + ATE DOT 4, Rear CS style pedestal spoiler. Eleanor style side scoops, "C" style side decals, Black AM BOSS style roof vinyl, black hood custom vinyl & Black pony.