Not without hearing from Lancia or Ford legal department. So, no.
So in theory an independant tuner could turn up with a WRC27 car and a 1980's GpB lookalike body within reason without the 1980's wings. Or something that looks like a Lancia Stratos or Mk2 Escort.

what? i could swear i read that builders needed to have some kinda of manufacturer 'agreement' and that the body pannels needed to be more or less like an actual road car. i think NOT having to...
WRC mainclass from 2027