Well, this is a post for Bruce A. Toelle...but I run one of these pieces and can partially answer your questions. I don't know what a PR is, please define.
A shift kit is included. Not as a separate package for you to install, but you send Bruce your valvebody for modifications. If that valve body is the TR-specific BR valve body, then I believe it is a matter-of-fact part of the rebuild. Not however that a BAT brake is not a bolt on piece. As stated above, Bruce modifies the valve body you send him. There are also other modificatoins that are done to the insides of the transmission...effectively requiring the whole tranny be shipped to Bruce or your local transmission guy can do the mods.
There is no need to "plug the lines" for regular use. The transbrake only operates with the shifter in first gear and the trans brake button pushed. Other than that, it operates like any other forward pattern automatic valve body.
HTH,