Need to spec up a drive shaft - Not sure how strong it needs to be?

Strange engineering makes some pretty amazing stuff, shocks, driveshafts rear ends etc. http://www.strangeengineering.net i had them send me a full catalog a while back and ive pretty well decided on them to do most of my drivetrain parts. is your car leaving at 5000 on a transbrake or clutch? or footbraking from 2500, if just footbraking i would think a 3" tube with 1350 joints would be more than enough. the billet yokes would be a good idea if your leaving the line super hard but if not i wouldnt worry about it. anyways thats my two cents