haha this one looks awesome ;D Great ideas!
We can start with the Design, What you have done what i can see is pretty cool, Makes it look like a Real custom car! (obviously).
If we look at the front you have added you can see that you have put it there by computer magic

as the colours arent really matching, wich is a shame. But i'm not blaming you to make them fit you would probably have to rebrush almost the whole front. But you have succeeded in finding a great Donor and placed it well ! However it is a tiny bit off.
You can see that by looking at the Front (Left side), as its pointing like Backwards imo.
However as you haven't posted a Original, (not what i can see anyway) It is pretty hard to judge!
But you have done a good job! but try spending more time with your chops, so you for about 110% knows that you have pulled of all that you can do ! Makes the quality of the chop so much better!.
Now get Chopping more!!

//NiBs