Just do as he says, whip a quarter card out and put a box there it will let you know how it will behave in minutes rather than ‘building somethingNot the doors. The rear side panels. But yea. I’d do only one at first.
or make a manifold over the tank for the rear shelf to breathe through all four driver holes present and attach a pair of twelves to it in the boot, the sq will be through the roof and the front stage will have better sq without the rears in the mix