Once the decal goes it's dead, the bummer is the paint underneath will have a deeper color than the rest of the car.

The look you have with the paneling & all has been done tho. Just in lime green. In the years I have been lookin for a 411/412 square I have never seen one chopped, & the pic just looks mean.

I'd definately give some thought to surface mount signal lamps tho, they ruin the lines. Also there are probably some 1 piece headlight housings with similar angles that could be modified to fit in place of the dual 7" rounds.