Rear quarter modification ?'s

[Berg]

I'd keep it for safety/ insurance liability issues, and they don't look bad in my opinion. If you were looking for a more flush fitting light you could try scouring the junk yards for something that came with a similar size light that mounts from the back

This is a kit Denniskirk makes for motorcycles and custom projects, there are quite a few hot rod shops with DOT versions of lights like this. They don't stick out when they aren't lit but the LEDs are bright and effective, and there are plenty of DOT approved lights that look great. I think if you did like a 2nd gen camaro/firebird light that might not look too bad either.