low rear end ratio's....where at? 3.07/3.23 etc

[hcaz095]

I am looking at doing a diesel conversion in the future... Due to the low rpm's of diesels, I would need a low ratio rear end, which is somewhat uncommon in these years trucks. Since I would be re-doing the drivetrain anyways (engine/trans) I would need a new driveshaft length, so the rear-end is not that big of an issue. What other options do I have for a regular width rear axle? preferably with rear disk brakes. Any info is appreciated. I am not sure on power, but options for low power(cummins b3.3t), or rear ends that will hold up to the torque of a 6bt. Thanks for the input.

~Zach