I did a bit more work on the Bronco today. All the small parts to make my Spectre air filter setup work came in. The Spectre kit showed up a few days ago, but the air filter base is a drop base, and that interferes with the transmission linkage. Also, the housing would hit the distributor and firewall if centered over the throttle body. I found a non-drop base air filter bottom that was offset, it fit great. Here is the final install picture:
You can't tell in the picture, but the filter is offset to the passenger side by about two inches. It's not that easy to notice in person either.
Here is where the ducts go, I added the screws after taking the pictures.
Passenger side:
Driver side:
I had to oval the tubing a bit to fit past the radiator, but I'm not too concerned about it. The tubing is 4", two of those is far more area than the single 3" of the exhaust. Before this setup the engine was breathing 140ºf+ air once the engine was warmed up, now it's pretty much ambient.
This is how the battery wiring wound up, I have about 1500CCA available with this setup. 350 feet of various sized split loom arrived today and tomorrow I'll tackle protecting those wires.
Here is the chassis ground, I was very fortunate that this JL Audio ground stud fit in the factory jack bolt. I have two JL ground studs near the amps, I will eventually tie them all together and add one to the actual frame.