Box ideas for 2 alpine type r 10 1042D

[Bgkybeats]

I'm looking to build a big ported box for 2 alpine type r 10 1042D.. I have a 3000 watt bassinferno amp.. I'm putting them n a 98 blazer 4 door with a drop tail gate.. I want at least 1 cubic ft of air space per sub.. I think subs faced up and big port at bottom of box at the tail gate.. But what ever is best for deep bass.. I only have one hooked up now in a ported box and it sounds good for what it is.. If u have any ideas or specs let me know