Get a smashed Ford Escape/Mazda Tribute with the 2WD V6. This will give you a nice 3L and the beefiest CD4E around. Then, send the tranny and torque convertor to LevelTen, and let them have their way with it. Add PhantomGrip, and hollow halfshafts.
The 3L can get a good treatment with low comp pistons, rods, and maybe a custom crank. If you're getting custom crank and rods, you might as well stroke it out to ~3.4L. Keep the stock cams, or use SVT ones with the turbo. No need for custom ones.
Get the 2000 SVT upper and lower intake, 65mm TB, 80mm Ford F150 MAF (no need for adjustable) and a nice, big K&N conical.
24Lbs Injectors, bigger fuel pump.
With the turbo kit, you can just use gutted pre-cats. After the turbo, high-flow (or no) cat with high flow catback.
You will need to keep the stock-ish Ford PCM for the tranny, but control the air/fuel with an Apex'i S-AFC. Control the timing with the ITC. Custom burn chip with only changes to the IMRC control code, and better tranny shifts.
That's it.