Most do the A pillar the new A pillar plastic isn't very costly if you ever want to go back to stock. On the older trucks a pod like that cannot be used not enough space. Anything like that being held up with double sided tape isn't that secure specially with 2/3 gauges.
Although it looks nice not sure I would go that route without a better mount. Being held up by the mirror wouldn't fly.
Mine is a 4 gauge, and I'm not having any kind of problem.