67-72 Corner speaker brackets install

[Ironhorse]

Finally got to start the install on these late this afternoon on my '71 4x4 long bed. Removed the retractable seat belts and the custom seat for better access and view. Right now they are just loosely fitted into the corner, hope to actually get busy tomorrow and get them fastened in. Plan is to fill the upper cab corner cavity on both sides with insulation and also use a foil wrapped 1/4 " bubble wrap insulation in the actual corner behind the speaker to help the Pioneer 150W tri-axial 6x9's. Bear in mind I am not a for real audio expert so I'm kinda' going on the rough here. Any one who has some tips or better thoughts than my self feel free to join in.