I came across a member from a Super Duty forum (who does great vids btw) and noticed where he located his aux connection and was just thinking of copying him.
Right at the 3:15 mark is where he installs his.
I put my air connector on the trailer hitch, just had to make the hole bigger. I used a 1/4" internal thread bulkhead connector. They are a standard part in the fuel section at West Marine.
I also replaced the compressor with an Air Zenith 200 psi, 100% duty cycle unit.
It is not finished yet but is using two pressure switch. I have a switch in the tool box to switch between 150 and 200 psi ( it will eventually be 175). I added a manifold since the tank only has two fittings. Also have a 200 psi blow valve.
The air zenith is quieter then the Firestone pump and it fills from empty faster.
1000 engine rpm Firestone = 0 to 150 4:52
1000 engine rpm Air Zenith = 0 to 150 3:15
I'll add the other pics on the FTE forum.
http://www.ford-trucks.com/forums/1...ech-hybrid-air-over-leaf-rear-suspension.html