what you get,, and what you need to do,,if you get it.
for a SRT6,,,nothing just bolt it in ,,add lube
for a limited take the diff yoke off and install the one from your diff,,call Rudy for a tcm ,,set up to a 307 then install the diff and the tcm ,add lube and your done.

I do have a 307 diff with the wavetrac in it new bearings,,newer gears only 10,000 miles on the gears every thing else is new,(wavetrac,,,bearings,,seals,squash washer nut),everything new except the ring and pinion which has 10,024 miles on it. cost $ 2100 delivered. in the mainland U.S.A.
jim

Note:: 307 diff $500.+
wavetrac $1200.
wavetrac installed in diff, labor $300.
bearings, nut, allwashers and spacers $378.+ labor $200.
total $2578.00
now you have the rest of the story (PH)