Completed the install today. Please excuse the truck, just came back from VT and its covered in road salt.
the installation of these Air Bags is really easy.
The kit components are really well made, very heavy, powder coated. The instructions were adequate and the kit was complete. You dont have to make any changes to the existing suspension set up, you simply add the kit on.
I was able to do a full axle drop and the kit allowed it, the bags are plenty long.
Symptoms: the truck was squatting almost an inch after adding about 250 pounds in the bed. I plan on keeping the weight back there since the ride is so much better.
Model: "Air Lift" 59516
Fits: 1998-2011 Rangers
Once this was complete the truck rides at stock height with 0-5psi loaded into the air bags, and no load in the bed. After loading the 250 pounds it sat down like it did before, and i pressurized the system to about 15 psi and it sat right up where it should be stock. Measurements were made from the axle to the frame, and from the wheel hub center to the fender lip. from the ground to the fender lip ended up being about 35.5". You can lift the rear end WAY up into the air if you want its crazy.
Its a very straight forward install.
you install the lower bracket with lock nuts and U bolts centered over the axle. Attach the upper bracket by drilling 4 holes through the frame for the hardware, while using the alignment / spacing tool (included). do the same to the other side. Route the air lines, install the nipples.
Drop in the air bags, connect the fittings.
reinstall the tires, lower the axle all the way.
then lower the truck back down with the bags at 5psi and if you did it right it should be sitting at stock height.
i want to thank the community for their help with this project
Its hard to tell the ride height changes from the photos since we're only talking about an inch here. In a week or so i'll have a 500 pound load in the bed and will do before and after shots.
Fill ports, thanks to RangerDave and Morgan
Beds loaded, no pressure
beds loaded, system charged with 15psi