Ok, I'm done with the left side. I pretty much followed Kate's guide and I do have clearance, but its nothing to rave about. I'm pretty sure I'm going to experience some rubbing with suspension articulation.
This pic shows the screws removed from the splash guard and the next pic shows the screws themselves.
Now the splash guard can be pulled away and bent upward. I used a bungee to my door mirror to retain it.
Now the structure is revealed below.
And for comparison this is the clad and sheet metal removed.
Save this anchor/clip nut.
The next two pics show the edge that needs to be hammered back.
I used a small handsaw to cut away this piece because there was nothing behind it now.
Because I'm such a neatnik I radiused the lower corner. The hole above it is where the saved anchor/clip nut will be reused (in the sheet metal behind).
Now tuck the splash guard back behind the clad and reinstall the screws. Done.
Well, not quite. I didn't like how close this section of the splash guard looked to my tire so I sawed it off.
Well, I hope this is informative and good luck with installation of your humongus tires in the future. If I missed anything let me know.