An antiroll bar is spring steel- - - -basically a side to side torsion bar to resist body lean in turns. Going to a much larger diameter bar than original will result in a lot of ride roughness if only one wheel hits a bump or drops into a pothole. It will also transfer a lot of stress to the frame rails ahead of the front suspension crossmember. Handling in turns will also be radically different, so educate yourself on what to expect by pushing the envelope a little where it's safe to do so.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!