1-1/8 & 1-1/4 front sway bar vs factory 7/8?

Ok cool just trying to get others opinions before i make a decision, i talked with firm feel and they reccomended a 1-1/8 bar but said i also could go with a 1-1/4. Said he was running a 1-1/4 on his 75 valiant with 1” torsion bars and was running a 235 15” all around and it handled great, but i know every car is different