use an allied bomber and transform it into a b17 or lancaster: is it possible?

[Dekioo]

let me explain: if I understood correctly, the developers would not like to add heavy bombers. so I wondered if it was possible to use an existing plane (for example a b25 or an A20) and modify its appearance to transform it into a heavy bomber? using a mod for example. 
it would only be graphic, even if it keeps the old hitbox. it would be possible to make certain hitboxes coincide by taking certain liberties on the sizes (for example: the two reactors in common).

[LukeFF]

No, that's not possible.