Most car games allow modding, so I'd like to hope so.
Forza 3 had engine swaps + other mods so that would've been a great game for a Fiero.
Again, all these games have silly ****ty cars, yet some of the better stuff to have isn't in there.
In Forza 3, they could've easily introduced a GP GTP and allowed for a RWD or AWD conversion, and then the normal mods... I mean, If I can do it to a PT Cruiser, why not a GP?