A couple of Google image searches suggests that DB4 convertibles don't have wheelarch flares, but Flam touring convertibles do. Pretty strong evidence?
Given the amount of work that would be required to convert the 'face' of a Flaminia to the DB look, I'm surprised they didn't bother changing the arches too... mind you, if you're about to throw the thing over cliff, how much would you bother...
The quality of work around the grille/bonnet surround doesn't look to clever on the Italian Job 'Aston' either.
vs.