[4valve 4tw?]

This can't end well. Decide which you'd like to say you have, that's what it comes down to. Personally, for the cost its gonna take to build up that 5.4, you could just supercharge your Mach. Or do some 96-98 cobra cams, call it a day, and keep plenty of cash in your pocket. That and I'm never for adding weight when, plain and simple, its not necessary.

But yeah, this thread probably won't last long...