Do you already have the 8'' subs or are you still shopping around? (1) 10'' ported or (1) 12'' ported would get plenty loud in there, it just depends on what you can fit. I bought a 10'' Fi BL and had trouble fitting a box with enough port area for my reg cab ranger. But S10s have way more room from what I've seen/read. Let me know if you're interested in the Fi BL, it only has a couple of hours play time on it.