need help on designing a ported box for my 4 12s in my king cab sonoma

[need help on designing a ported box for my 4 12s in my king cab sonoma]

Yea

[need help on designing a ported box for my 4 12s in my king cab sonoma]

The box i got now my boy did for three subs and sound like shit

[need help on designing a ported box for my 4 12s in my king cab sonoma]

I have the pioneer permiers 3500 watt one and yea port will fire to the front

[need help on designing a ported box for my 4 12s in my king cab sonoma]

I only have from side to side of the truck 39" from the back of the seat to back of the cab 20" and from floor to bottom of window 24" try to still see our back window what u mean by orientation

[need help on designing a ported box for my 4 12s in my king cab sonoma]

i have a 96 sonoma king cab i need help designing a ported box tuned in the 30s to kill lows if some one could help i just need a blue print  to biuld off of