@ endac: Thank you!
More details for you here:
Here you see the original firewall and a picture of a real firewall printed on scale.
The difference is so huge I decided to make it completely new... while doing that I actually realized that I had to make the whole engine compartment new.
So here you have pictures of the firewall. I'll post pictures of the complete engine compartment as soon as it's ready.
Before:
After:
