I had posted on this very topic before, but it's now part of the long lost rv.net archives as I initially posted on this 4-5 years ago. IAMICHABOD would have replied with a link to my earlier post, but was unable to find it - thus, this new reply:
I converted my overhead from an entertainment system with mini-bunks to a full overhead bunk.
First and foremost, determine if the overhead is capable of supporting a bunk. Many class C's were built where the overhead area was never intended for anything except for what was installed.
To determine if the overhead is capable, review the various options for your specific model.
We have a 2016 2250S Sunseeker, and looking at the literature tells us:
that it has the option for the bunk in the overhead.
This is one of two pictures I have of the entertainment center before I cleared the area:
Given that, then you can change it out. However, you'll need to proficient enough to repair access holes for wiring and screw holes, etc once the entertainment system has been removed. FR drilled a large hole at the forward edge of the ceiling for the cables, 12V and 115V wiring:
Fortunately, I had access to some of the same ceiling material from a storage compartment so I was able to patch the area.
Here's a photo essay
Photo Essay of the project.
I've since added the TV at the upper right side, but only as a temporary setup to keep the G'children sedated during our trip to/from the family reunion last summer. I have plans to build a proper cabinet & support for the TV, but other projects have taken precedence.
Let me know if you have questions!
--Bruce.
2016 Forest River Sunseeker 2250SLEC Chevrolet 6.0L