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Edit…
1. when mentioning I lost 10db moving the ported box in trunk. I had it 6” from the rear facing the rear first, wanted trunk space back so pushed it towards the front of the car to give me about 2’ of trunk space. That made me lose 10db.

I would of course build a panel to the face of the box to make it look nice and flush

2. If taking my ported box facing into the cabin. Why is it so important to seal the trunk. Even tiny holes. I have yet to find real proof that it matters. People say to stop waves canceling but lest be honest here, there is not going to be much bass waves coming thru some tiny holes that are probably behind interior trim. And what tiny amount might come thru the said holes is going to be so small it’s highly unlikely it could have impact on the front waves where the subs and port face.
I would love to hear and see real proof and not just because it’s what people have read in forums. If it was an infinite baffle setup then of course it makes sense. But I think as time passes people have mixed things up and assumed it mattered for front facing ported boxes.
When talking small holes what is y’all’s definition of small 1” or less or?

I’ve been thinking it would be nice to have my trunk space back. If i was to make a wall or seal off the trunk with subs and port facing into the cabin would I lose much spl vs being in a ported box rear facing as close to the rear of car as possible? I took some measurements with the box facing to the rear about 2’ from the rear (so I could have some trunk space) and lost about 10db So I moved it back It would be a lot if work to seal the trunk only to lose spl. Would I need more power to maintain the spl? I’m guessing the bass would be more defined and SQ oriented with a sealed trunk? Or am I wrong. I currently have a B2 audio 2500.1 pushing 2 skar evl 12s ported.