I have not adapted one to a BB mopar but if you don't mind, I would like to give you some advise.
If you are using a full manual VB, doesn't matter if its a t-brake or not, make sure you measure the pressure going into the transmission cooler. T-400 are known to cause premature thrust bearing failures due to there inability to properly regulate the pressure into the converter. With a full manual VB, full line pressure will charge the converter(About 200 PSI) and thrust it into the crank. There are ways to fix this if you find this to be an issue.I done it myself on my Brand X stuff.
Sorry to get off topic but thought it was worth the warning.