How does this look for a box plan. I am looking at going ahead and buying a 21in DP since I have plenty of airspace to work with. I also wanted as much cone area as possible that would be ok powered by my Saz-1500v.2.

This would replace the rear seats in my 07 F250 and would be at window line. Goal is to hammer the lows, get loud as piss and sound good doing it.

Will this work or should I change anything.

Sub / Port will be facing forward.

Around 10cu tuned at 30hz

if it was me i would 45 the port corners. what kind of bracing are you gonna use? im about to build a box for a 21 dp but in an ext cab gmc sierra.