i have a l5 10 in my reg cab ranger, and its...loud. the sub hits every note clean and clear, its a very SQ set up, but it can get the lows as good as my buddies 2 12's in a ported box. the box is a sealed box with 1.1 cuft. im about to build me a new box housing 2 l5 10's in a 2 cuft box, but in my opnion go with sealed box first and if it isnt loud enough then port it but i think you will be pleased with a sealed box
i would say a 1 cuft box or bigger would hit, a 1 cuft box is like the perfect box for a 10 if you seal it, so if you can get one atleast 1 cuft in a sealed box you should be fine, especially with a 600 watt kicker pushing it