I want to build a sub box for behind seat in my 1987 gmc sierra classic, reg cab.?

Anthony

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May 24, 2008
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i want it to fit behind the bench in my reg cab, i want to fit in 3 10" JL subs. the mounting depth is 4.82 inches, requires 0.25 inches clearance behind subs. Does any one know where i can get some plans or have some ?
 
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