It's nice you're giving this away for free but I bought your stuff before and we both know you can do a lot better.
I am sure anyone who has seen your better work will expect a better job from you next time.
Not trying to be hard or anything but you're an artist now and your work is in the TGC store.It's time for you to take it to the next level and make the higher quality stuff.
Just to let you know there is such a thing as making something too low poly.If you have any doubts make a low poly and then a high poly version.
That all said...I have never tried to model a vehicle from the outside (tried to make a dashboard once but that's a horro story for another time) so I cannot claim to be able to do better.
The floating skull is gone but the flames burn on!!!