No, there is nothing such as magical LEDs that will compensate for blocking off active lens area. Most "LED bulbs" don't work safely or effectively, even without the lens blocked.
Then isn't the safest solution to create red lenses with LED boards behind them? They would look very close to the original with the brightness of modern vehicles.
I'd love to have amber front parking/turn signal lights for my '65 Dart Charger that other motorists could actually see on a sunny day. Same with the tail/stop/turn signal lights.
