To get to my heater fan and to remove the entire A/C housing on my '70 300
, I had to remove the passenger inner fender.
As mentioned above, it took longer to remove the various items bolted to the inner and to remove the wheel, than it did removing the ten (or so) bolts and removing the inner. Doing so does allow for a lot of access to the stub and the A arms, the side of the engine, etc. I have not removed the driver side, but it is essentially the same easy procedure once the engine-side accessories are removed. Again, this is for a 70 Hurst, not a 68 Fury, so YMMV.
Reinstalling it is a bit fiddly when aligning bolt holes, as the inner is pretty flexible when not bolted in place. You'll find that an awl or small drift pin is important to line those bolt holes up.
If you don't already have it, you'll probably want an underhood wiring strap package, like this: Electrical, Under Hood Strap Kits :Mega Parts USA
The OEM straps are dead-brittle by now.
The advice from Dave Lux regarding bolts near the battery a good thing to keep in mind. If your battery tray is okay, the inner's bolts "should
" be okay, but anything near a battery just LOVES corrode.