Custom V8 thing

Here's an engine I made. I'm planning on using it on one of my cars when we'll be able to do so, but it still needs to be greatly improved.
What do you think about it? Any suggestions?

Here's the engine's files, just in case you'd like to improve it or something.
https://www.dropbox.com/s/sxr61e8gx1gceb9/V81GTA.zip
What do you think about it? Any suggestions?
Here's the engine's files, just in case you'd like to improve it or something.

https://www.dropbox.com/s/sxr61e8gx1gceb9/V81GTA.zip