well I have a 4.6 Mod, but I need the 4.6 DOHC in there, i am stuck with the crappy SOHC thing that only makes 205hp, the DOHC from the Mark VIII makes 300hp…i think its a better base motor to start with. I need to get an aftermarket hood, or have a hood scoop made for the intake, the DOHC is a little taller.