That F/R isn't bad for FWD. I don't think you'd want 50/50 on an FWD car. RWD's have to shoot for that, or they won't get any traction at the drive wheels.
Also, your cross-weights make me think that relocating the battery to the trunk might not be the best idea, or at least that it might be unnecessary.
Gee, maybe those Ford engineers actually knew what they were doing?
