I have a blown 4.6 5speed. Im looking for some pep in my step. What is a good avenue for getting more zip?
Would a 5.4 work or stay with the 4.6?

 

Welcome to the site..

A swap would be a sizable job, and the costs involved generally as well unless a complete donor is available. Emissions may come into play depending on your state/location. Then there's resale if that is part of the equation. But at 18...
What do you do with the truck, pull, off-road, play?