DC Level 3 10 box questions

[brocken]

Sorry to double post. I tried in the DC subforum and on the Caraudio forums.

I just purchased a Level 3 10 with level 4 coils and extra spider.

This is going in a 2010 F150 supercrew and there's a premade box that has 1.25 cuft. If I understand the specs correctly, that's an optimum volume for this sub for ported?

I was hoping I can use polyfil to compensate for the driver's volume?(I've been since told this is a bad idea to use polyfil in a ported?)

My goal is more SQ than all out output. Would I be better with the 1 cuft box volume ported?

Also, with either size box can I get a recommendation on port diameter and length? I tried modeling the sub in Winisd but must have entered something wrong. I got a really high volume for the box, like 50 something liters.

If this box size is really not ideal even though DC site says so, what size would be optimal for sq(ported or sealed is fine).

Worst case scenario I can spend a couple of my precious weekends and try to make a box instead of using the premade box.

Thanks!

Jared