How to reduce body roll?

Hey beamers, I'm using a gravil grand marshal and I made it a cop car for drifting, but how do I reduce the amount of body roll it produces? It basically looks like a boat on a wavey sea and I want a more nicer look to it cause I dont think drift cars should be rocking back and forth 24/7

 

Race sway bars with a high "spring" rate should do the trick, along with stiffer race springs.