Am I seeing things? Firewall is lower on one side

[Goinlow64]

Hey everyone! Just started in on my first build. It is a 1964 SWB. I just wrapped up putting discs up front and also 1" drop coils and 2" drop spindles.

Here is where the fun starts. Looking at the truck from the front, it look like the driver's side was lower then the passenger. Sure enough it is. I measured the rear coils and it appears my driver side is shorter by 3/4" or so. I am putting in 4" drops so this should clear this up, BUT Looking at my firewall, the drivers side is again lower. I measured each side of the firewall and it is about 1/2 or 3/4" lower on the driver side. Is this normal? I have attached a picture for you to "see for yourself."

Let me know what you think! and thanks for your help! Pelase forgive me for some of my basic questions!