Gen3 hemi tkx swap

Some threads that might be worth reading:

https://www.forabodiesonly.com/mopar/threads/tremec-tkx-first-cuts.497360/
https://www.forabodiesonly.com/mopar/threads/convince-me-to-put-a-tkx-in-my-dart.515130/
Not certain they will answer any of your questions, but the second thread is an SST kit so maybe it will be helpful?