i bought an ext. cab bed for my nissan not knowing they were different, and in order for the wheels to be centered evenly in the wheel wells, there was between and 1" to 2" gap, dont remeber exactly, between the bed and cab
the beds are the same size as far as i kno but the wheel well is a 3" difference if im correct. i have a ex cab bed if anyone needs. $75 obo. it got rear ended but could be fixed. i jsut need it gone OBO
Bed is about 3/4" longer for the xcab bed, and the wheel wells are in different positioning. They are not interchangeable unless you modify it heavily.