Here's a cheap and easy backup camera option for E-Bodies.
My Challenger has the stupid SE rear window, that along with a small floppy passenger side mirror makes for a terrible blind spot.

I got this on Amazon for only $35, and it works great. I wired it to be constantly on.
Added a Velco strip so it can be easily removed, and ran the hard wire through the interior to plate.

I can now see cars beside me, may need to tweak the aim for more bias towards passenger side.

Pros:
- It's cheap, only $35
- Hard wired, looked at WiFi options, but all reviews complained about phone issues
- Helps with blind spot, along with the usual backing up
- Easily disconnected for removal
- Nice 4.3" size screen, fits perfect in ashtray
- Did I meation it's cheap..........

Cons:
- Have to leave ashtray open, although it comes with suction cup for windshield
- 140 deg view angle, 180 deg might be better for blind spot issue
- Had to mount camera on front side of plate because of the factory license plate light interference
- Drillled holes in ashtray mount and trunk for wiring. My car is far from original, so this didn't bother me