Here is my approach!
I mounted the valve & ECU to the driver's side frame rail & used Porterbuilt brackets for the compressors.
Porterbuilt sent me two of the same hand bottom brackets by accident, so this is how I mocked the pass-side up. LOL!
Here are a few pics of the ride height sensors!
Front driver's side:
Rear driver's side:
NOTE: I shortened-up the harness after I was sure that all was working properly.