Welcome. The front fenders on your car are 71-72 as is the grill the lower fascia and the bumper. I can't see the rear bumper clearly, but it looks to be 71-72 as well. A proper Mach 1 should have a honeycomb tail light panel trim as well.
Now having spotted those issues, I'll say this as a 1973 Q code owner. I would love to have 71-72 fenders and the chrome front bumper. I would love to change my rear bumper mounts to the earlier style and tuck my bumper in closer and get rid of the filler panels. If I had to replace my tail panel and had the choice, I would not use the trim panel. I prefer my hood's paint treatment, but other than that when I finally have to break down and repaint, my car will end up looking more like yours!
Great looking car any way you slice it!
