how hard is this to replace? Is a flux core mig welder good enough to do it with? And lastly how long should this take a decent (lets just say 3 bannannas) mechanic to do. Lastly, does anyone have any advise from when they did it and what would they do different? I think i will wait untill fall to start this project. Driving my contour in the summer just makes me sick when I could be driving the cruiser with no top and no doors. damn,,,almost forgot.... Its an Oct 74 fj40, no ambulance doors.