joe440 said

i built one pretty much just like that. heres how i did it. where you have black in your drawing, i used wood(except in the front i left open for wires) to give it a strong base. when you have that made you want to bolt it to the shifter to make sure it lines up the way you want. Then i layed out tin foil and layed sheets of fiberglass on that and added the hardner. i did about 3 layers and let it sit over night. the next day when it was hard, i layed them up to the sides of the wood and staple gunned them to it. then i cut the access fiberglass off then put it in the car and made two holes on the front sides and the back sides to mount it to the tranny tunnel. then i cut out round circles of wood and bondoed them to the sides where i wanted my speakers and cut out the centers. hope this can help you, if you got any other questions let me know

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