Hi,
I never had backup lights, but did have a set of backup deletes rechromed, I removed the studs.
If you haven't already gotten a quote I will fore warn you die cast parts like the backup light housing can be expensive as they have to drill out each pit and silver solder each one, so a nicer core will cost you less.
My deletes cost me 200 bucks each, I had a second set with more pits and they quoted me 500 a piece.
As for the light sockets not sure how they come out, but check with your plater and they should tell you what to leave or remove.
Regards,