1). I can't tell if your sub is dual 2 or dual 4 by "Cerwin Vega 122/124 Stroker 12" sub." Maybe you can check the terminal cup with a digital multimeter set to ohms and see what it reads. If it says 1 or 4 ohms, it's a dual 2 ohm sub. If it says 2 or (highly unlikely) 8 ohms, then it's a dual 4 ohm sub.
2). What is the amp's model number? "Boss 2000 watt" doesn't tell us much, but I would look it up for you with the actual model number.
3). What are the dimensions of the box, including the port area, and if you can, length?