So I have the common manifold leak, and wondering how much of a pain it is to replace it? and how much would it cost to put headers on it? ALSO (: the manifold is warped, lave it be or fix em both? It doesnt bother me but i want the best of rmy v10!

I work at a ford dealership, hooked it up to the scanner, and i have a vacuum leak? has anybody had one in their trucks? if so where? Thanks!