Help check my specs! Please!

[Stangs400 10+ year member]

Hey guys, im helping a buddy make a box for his jeep and this is what we came up with after using bassbox 6 pro.... does this port sound about right..should be tuned to around 29hz? I drew this quick picture..

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[Stangs400 10+ year member]

crap cant find the pic but the outside dimensions were 42'' wide 17.5'' tall and 12'' deep... heres a really really quic drawing to show you want its gonna look like...

port is 2''tall x 10''wide interal by i believe 27'' does this sound about right?