Idea for fuller sound

I currently run Diamond D-6 5.25" comps in stock dash location of '06 Jeep Wrangler. The 5.25 comps are very thin sounding powered by my Alpine PDX 4.150 and crossed over at 80hz. Anyone familiar with Jeep Wranglers have seen the sound pods that hang from the rollbar and sit just above and behind the driver and passenger. What would the likely result be if I used 6.5" woofers for rear fill in those pods? This would be just woofers and no tweeters. My goal is to obtain more upper to mid bass.

Any ideas? Thanks!

I think you'd be pleasantly surprised at what I've accomplished so far.  I'm just picky about  sound quality. As stated above; it's a Wrangler.

I was reading one of the stickys here that really seemed to turn people away from using kick pods. I'd like to find someone local to build some fiberglass pods on my doors. I've already seen some of the local butchers at work and my new Wrangler looks like swiss cheese under the carpet from all the goof ups.