I think the 4.6 mustangs are very dependable. Being an 02 you dont have to worry about the intake manifold cracking at the plastic crossover like the earlier 96-98 and some 99-01s had a problem with. Your manifold (well the one u would be gettin) has an aluminum crossover. My car has 62k on it and slightly modified and Id trust it to California and back. Only thing i ever had a problem with besides basic maitenance was the Idle Air Control valve went bad. THis controls the idle, well part of it and when it starts to go the car wont idle and will die. It gets clogged with carbon over the years. It started acting up around 55k. Some say to take it off (which is easy) and to clean it but its better just to get a new one. Like 45 bucks at the local auto parts store. Other then that thats the only thing i know that can go bad and does alot, but its a super easy fix.