Welcome to Eurobricks! May I suggest that you introduce yourself in the Hello! My name is...-forum? :-)
Secondly, could you please scale down your pictures a bit? At the moment it completely screws up the rendering of the page, at least on my laptop ;-)
Third, to your actual question.. the front wheels could be a problem, not sure how well they are connected to the "plate 3 x 2 with hole"s on the sides, but I don't think that is sturdy enough, however, if you add something in the middle to connect them to it should work out okay. As I haven't seen the back of the car I'm afraid I don't have more to add, and I don't have the necessary pieces to build this either :-/