A-Pillar,lets drivers that drive by see that you have mods done to the truck.
thats how I spot drivers with chips and what not.

well im not lookng to have everybody say oh look that guy has something done to his pickup but the a pillar is the easiest place to see them at a glance i like the trucks i work on and my own to be covert sleepers no flash no stacks or shiny tips no stickers let the other driver make up there mind when the light changes

SoCal Diesel - BIllet Gauge mounts

then maybe a gauge pod like this like you will

Also at night when its dark they look neat lit up.