I played with may under the seat and behind the seat ideas on the crewcab. Nothing is really fitting my needs.... and with the bed cover I added to the truck I cant get to the tool box with out removing the cover. So I am sliding back the tool box and playing with bed box idea. I have done blow threw in a regular cab and it hurt but didnt meter well. So I was looking into the idea of a 4th order or 6th order for the crewcab. Not a huge cut in the bed/cab and easy to cover if I sell it at some point. ATM I have 2 DS18 H-KO2 HOOLIGAN for subs and I will most likely run sundown sub/subs. Not a bunch of data online for this truck and good #'s at the mic.