ported box ideas for a 1995 extended GM 1500 - FI Q

[B_Campbell 10+ year member]

I just picked up an FI Q 15 and was wondering if anyone with an older extended cab chevy or gmc has build a box for a similar 15, like a xxx, or a mag - 32-35hz and around 4 cubes, and has any plans or any ideas to do it right, like build a shelf on the floor so it sits flat or something

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[B_Campbell 10+ year member]

I am thinking of taking out the backseat, not just folding it up and building a box all the way across the width where the old seat folded into rising up to the window line and extending flush with the floor, with 2 4in aeros tuned to 33hz firing up with the sub facing forward. Does any one have any pics similar to this in an extended cab