sorry i meant to say to run a 307 rear in a limited ,you need to replace the yoke on the srt6 rear, to the yoke from the limited, as the yoke is smaller on the limited
and the yoke on the driveshaft is smaller on both ends of the limited... swap the yoke (limited small yoke) on to the 3.07 and install....
This yoke swap can be done without a tear down of the rear.
there is another way without tearing down either rear end that is to \
use the rear 1/2 of a srt drive shaft,, they are all balanced 0 and if you do not have a good mech to swap the yoke YOU WILL GET A HOWL FROM YOUR REAR!