oh! the beam! Nah man, no chainsaws required. It lifts out really easily. No finangling required. If you have Bose audio or satellite radio i think, you'll find the Bose amp and satellite radio units under the foam beam. Bose is in the middle, radio on the right hand side. Here in Aussieland we dont get sat radio so we just have to deal with the Bose amp - which isnt too much of an issue because the harness is just long enough to be coaxed underneath the plastic covers to the left of the rear strut brace, over the hump and allow you to relocate the amp to the left side of your new enclosure. If you prefer a more stealthy relocation then you'll need to chop and extend the wiring.
But all it needs is for you to unmount it off the steel bracket (4x 10mm bolts) then use a large self tapping screw to fix one corner of it to your enclosure lid. Then lay the boot mat over it.
Foam beam comes with all 370's
afaik