Sounds good. I assume you are also looking at lowering the center of gravity by sinking the battery and fuel cell halfway down through the trunk pan to match the center of the mass of the engine that sits at that height up front. 50/50 also means a matching center of gravity height front and back.
It's why my SRT uses a battery mounted below the deck in the trunk and twin self-leveling saddle fuel tanks underneath the rear seats just in front of the rear axle.