That is a nice thread to reference.
https://www.yenko.net/ubbthreads/ubbt...9&page=all
Lud's car shows the battery. If you notice, the orange heater hose comming up through the floor is for the fuel pumps around the wheel well location previously shown.
You can build it down and dirty and it would be correct. Personally, I might try to class it up a bit, especially since it is going into a wagon. To find pics of these in a wagon would be a tough order.