I think F1 has never been based on production models, they're single seaters. Doesn't really matter if they're from a car manufacturer like Ferrari or from Williams, they're all single seaters. ...
After Léo Rossel, Pablo Sarrazin in the C3 Rally2 for Monte too(both helped by Stellantis Motorsport) ;)

With the reference volumes and requirement for body work, and by looking at the concept renders above, don't they resemble 'road models' even if they are bespoke designs? Think of the fans in parts...
WRC mainclass from 2027