breathegood

425 rwhp isnt going to happen N/A on the 4.6 without spending big money on the motor. More than you would for F/I. Cams can be a nice upgrade, but save the heads until you are ready to go big. You will have nice gains at redline, but low end torque will suffer, and daily drivability along with it (voice of experience here) It's tough to hold out, but there isnt an upgrade beyond what you already have that will give you the satisfaction of forced induction.

Diabolical!

That list needs to be scrapped and the research needs to begin. Many items on that list range from unnecessary to incompatible. Read my sig. Make it your new list.

Kaidis

That'd be one of the reasons why I put it up. I'm still really new to large scale builds so I wanted input on the list as a whole to see what would be a good upgrade and what would be useless or incompatible.

Thanks for the input Diabolical!