I also would have my doubts to remove the 3rd brake light, for security reasons. Being driving behind a Morgan in a trucks high position I recognised, that the brake lights are hardly to see, namely at a bright daylight and short distance. This was also the moment I started to think how to improve the security.

The result is a flashing 3rd brake light mod (see link below, not really difficult) - with an enormous effect "to be seen", as confirmed by many drivers behind me. Even the MOT technician did not object the mod, more over he absolutely agreed!

http://www.talkmorgan.com/ubbthreads.php/topics/69044/1

regards

Peter