With the 6 speed you do not have a TCU((transmission control module)) so the swap is easy. U will need a srt-6 yoke as the limited and the srt yoke are different size.
so your driveshaft will not work with a 307 without swapping the yoke,, but if u swap the gears into your housing u can use your limited yoke . the cost to swap the gears woulf run between 5 and 700.00, where buy a 307 out of a srt6 and swap the yoke(use your yoke from your limited.
Just so u know i do have a 307 diff $150.00 + shipping and i have a limited yoke that i would throw in
I is a direct swap except for the yoke,,, the other way would buy the rear 1/2 of a srt-6 driveshaft, and i raced a crossfire that way as both driveshafts are balanced 0.
,,my way of install takes ne less than one hour as i have swapped about 20 rear ends so far in just crossfires.,, it should take u or your Mech. 3 to 4 hours, what ever way you go good luck, any problems or questions pm me. jim