Just a tip I learned from personal experience, you don't want to run the electric fuel pump in that location. I burned up 3 on my 260z i had mounted in the same location before talking to a local engine builder. He told me even the cheaper fuel pumps will last a lot longer when located closer to the fuel tank, because after they sit over night the fuel can bleed back to the tank and then the line is essentially dry the next time you start, and the pump has to pull all the way from the tank to the front of the car. He also told me most fuel pumps work better as a pusher from the back to the front and it creates more strain on the pump to pull that far all the time. After I relocated that cheap fuel pump to the back of the car i never had a fuel pump problems, and I ran a $25 pump from Oriellys for a long time after that.
So not trying to tell you how to build your car, but just offer some advice to keep it a bit more reliable so you dont have to worry about that pump again. And that looks like a great start of a 240z, and a great look bmw. Have fun with the Z