68 Lada Valiant

So I'm watching some videos on how to put together an audio system for this car. I think I'm going to build a box that will mount on the hump over the rear end and it seems like it's going to be a lot cheaper to rattle the **** out of this car than I thought. I want to feel the deck lid rattle from in the house lol.

I think I need at least 2 subwoofers