wanting to build a lay out

I want build a cockpet that be close to a real one should I used pictures of a real cockpet that I want to build? Any advice would be welcome and thanks

Totally! Get lots of photos, as many as you can. Use what you know to find what you don't know. You could also use cockpit posters. I found a 748 cockpit poster at Avsoft.com. You might find what you're looking for there. I used the poster, and lots of actual photos, cross referenced them and eventually came up with something that's probably close enough that you wouldn't notice.

Tell me what you're building, I actually might have something already (The 748 wasn't my first plan, and I have a few unfinished dimension specs for a couple aircraft)