This is my completed K5LA install on my 07 Lincoln Mark LT. Mounted horns in spare tire area, air system is mounted under the roll cover canister. 1/2" ID airlines and high flow fittings to valve and horns. 1/2"OD line ran to the stainless steel air “chuck” mounted on the back of the truck. A Graham White valve mounted in the center console with pressure gauge and switch.
This forum was very helpful to my install. Thanks to all who posted pics and advice.