The answer to your question depends on how much money you are willing to spend on your truck.

Cam change, better exhaust, a better manifold and cold air box will help some.

Nitrous Oxide, a turbocharger or even a supercharger would give you a large power boost.

Want more? Maybe a 605HP 4V crate engine from SVO would do it for you?

Ford Racing Romeo 605 HP Performance Crate Engine 5.4L 4V w/TVS Supercharger [M-6007-TVS] - $17,229.95 : Powered By Ford - Your only high performance parts supplier for your Ford car or truck, When you want it done right and done well there is only o

But, realistically, a few minor engine mods and a gearing change in the differential are probably all you need.