Yes, longer links will make the car roll more. Here is a link to the directions for the new style upper clamps. I can't remember if the instruction manual was so detailed or not. I keep this in my pit bag and refer to it a lot.
http://www.teamxray.com/teamxray/pro...with Adj. Roll
If you use longer links you may need to play with your droop. Running low droop (high # on gauge) will counter act the benefit of the chassis rolling, IMO.