Hope you like it and have fun with it!
Modifiers not applied (almost), no textures.
No HDRI is fine, but it would be great if you could get rid of the magenta. May I suggest a quick sky texture?
cant figure out why you set it up that way with the parents, key frames etc. but it looks cool, modeling is good, but a little heavy. I suggest getting rid of all that stuff, joining a lot of it together. if someone wants to animate it, it would not be difficult to set up, but if someone dont intend on animating it, they are stuck with all the extra visual cues (like those long lines showing the parent). ntm the lil bit of extra data making the blend bigger. but anyways. i like it, good job ! Im gonna use it on my zombie killing Duesenberg. ;)