Go to shelbycsxinfo.com and study all the photos, but keep in mind that not all the original 3000 series were kept original. I rebuilt my LAX dash in the street configuration, and don't understand why several builders have completely different dash layouts. The engine comparment is neat to try and replicate if you've got a carburator and aircleaner set up. If you've got a small block side feed F.I. set up, why bother. To really do the engine bay correctly, you need floor mounted brake and clutch pedals so you can have their resevoirs on the upper left side inner wall. You also need an aluminum
oil junction that mounts in front of and lower than the left head. I don't know if such a part is available at a reasonable cost. There used to be a great site for original Cobra photos called
427csx@citymax.com, but it's shut down. Most of the engine photos of original street cars there had chrome valve covers with a "427" emblem. Also, no holes for PCV, breather and
oil filler as the original intake manifold provided for these.