I just got a 91 pathfinder4x4 with a 5 speed and managed to already break an exhaust stud. (the one closest to the alternator). It broke flush against the head. Since I have to do the clutch anyways, I was going to just pull the engine instead of the trans and transfer case. What are my odds of an easy out working? Are Pacesetter headers smog legal in California? How hard are they to put on?