i'm not sure on the godspeed one, but have heard good reviews on it. stay away from the weapon r one. cosworth it awesome and if you're prepared to spend around $5k for a good turbo setup then why not spend the money for a IM that will keep up? don't forget you will have to either notch the IM or relocate the power steering pump for it to fit on there.
2013 F150 4x4 SCrew XLT 5.0L
Midwest Crew #22
Official FocusFest Event Planner