Might as well swap a 5L into it!
Agreed. I know everyone says this, but it's always 100x easier to swap in an engine that was designed for certain models of your car. For a 3.0/4.0, you'd probably have to fab up custom mounts, among a bunch of other things. Even if you're getting the engine for free, it's almost never worth it.
2002 Mineral grey GT 5 speed. Flowmaster 40's catback, Mach 1 grille delete, timing advance, push button starter, Bullitt pedals, FR500 steering wheel, K&N FIPK, Self ported upper intake w/ spacer, Pioneer Avic D3, MGW shifter, MM FL subframe connectors, Mach 1 springs, Bilstein HD struts/springs