I have (had*) the same OE Power Center configuration in my 5.0.
Are you considering recessing / rotating the entire Power Center or attempting to separate the breaker / fuse panel and relocate / rotate only that part?
In either case, there's two particular things I'd consider about an 'upward facing' arrangement:
- Ensuring that the converter has an adequate cooling airflow
- Recognizing that an upward-facing DC fuse panel / circuit board might be more at risk of accidental short from things falling on its horizontal face when servicing
The former could probably be addressed, the latter would be a no-go for me (YMMV).
I acknowledge the awkward access of the OE configuration, but personally, I'd deal with that on the hopefully rare occasions when service access is required rather than undertake the 'recess-and-rotate to horizontal' mod you seem to be considering.
Just one opinion, Have Fun!
(had*) - I've eliminated the OE power center as part of major electrical mods but my replacement stand-alone AC breaker and DC fuse panels are still located in the vertical face of a dinette bench seat (moved to passenger side with battery and other electrical gear).