It is very difficult, they have lots of down side issues, they are much more expensive than you may realize. Perhaps you should consider something else.
Issues:
-need mil eliminators
-can cook rag joint and cause steering failure
-bottom out
-in the way of tranny drop
-will leak if not installed properly, and sometimes will leak regardless
-some headers (MAC) are known to cause serious engine damage
-price of good headers is high
-price of install is high
does 200 bucks to install shorty headers sound too low?