With no other details, it sounds like you're trying to do an impossible job for no reason. A larger head usually has a larger "chamber" where the fuel and air gets squeezed into. That means with more area, less compression will result. Lower compression means lower horsepower. That is the goal only when adding a turbocharger. Turbocharging an engine with a normal compression ratio leads to all kinds of problems that almost always result in a destroyed engine.
I can't find a Ford model that even uses a 2.9L engine in the year you listed. If the head is from a different model, different year, or different engine size, it is very likely the intake manifold won't bolt up to it and the runners won't match up. Same goes for the exhaust manifold. I suggest you sell this car and buy what you want. Projects like this almost always end up in the front yard with a "For Sale As Is" sign in the window, and a box of parts in the trunk.
Friday, September 16th, 2016 AT 10:00 PM