how far did you have to move the seat up for those? ive got 10s behind my seat and i had to move mine up in my reg cab
In my regular cab the seat was all the way forward and the tilt all the way up but the old box was ~9" at the bottom and these are ~7". In the crew the seat is about half way forward so I'd say the seat would sit about like that in a regular cab.
ohh ive put 12" truck boxes behind my seat before and had to move my seat all the way forward and couldnt drive it at all, been dangerous to drive anyways with it like that