will front sway be enough

I would recomend going to the .890 Big Block bars with the sway bar. I have this combo with a sb in my Barracuda with XHD leaf springs out back. A firm but well controlled ride that is not choppy. The car handles so much better than it did with the \6 and \6 suspension. Mine car came with heavy duty suspension so it had the .850 bars and 6 leaf rear springs and i don't consider that adequate for the 6 leat alone a sb.