I need technical plans of racks.

Good morning. As I'm new here, I'd like to start by saying hello to everyone and congratulating you on the great work you do. I have a problem: I'm finishing my degree and I'm fully immersed in my final project. I need car chassis plans that include measurements, regardless of the model.
If anyone has any documents like this, I would be very grateful if you could send them to me.
Thanks in advance.