I have been using an extremeaire from Outback Extreme for the last 15 years or so. It has been great. Even moved it to my new truck a year or two ago. This thing has not hiccuped once in that time frame and well over 300k miles on it under the truck/s.
It is 100% duty cycle.
On my previous and now current truck I had/have it mounted behind the pass side of the cab under the bed up as high as I can get it. I do have a sort of box (sheet metal) around it. The top is open. I run horns up front with it and have a quick connect at the rear bumper as well. I also have a 2.5 gallon tank up under the bed. I use one of those coil hoses and it will reach any of my truck tires as well as any trailer tires.
Many folks go with Viar but I have no personal experience with them I would just make sure and get one of their 100% duty cycle ones
Extreme Outback several years ago came out with their magnum extremeaire and if I had to buy a new one I would go with that one.
https://www.extremeoutback.com/product-category/air-compressors/
