The offset bushings are a plus for any of the torsion bar suspension, muscle car era Mopars. They all came with the suspension set up for bias ply's, and they can all benefit from a little more positive caster if you're running radials.
The offset bushings only add a couple of degrees of caster, they install just like the OE bushings with exception of being directional. And once they're installed they really don't look all the different from stock. Unless you're going to run bias ply's I don't see a downside. Honestly I think the biggest drawback to them is that they don't add enough caster. They're ok for a cruiser and they're a big improvement over what you can get out of the stock bushings, but if you really want to handle you'd want more than what you can get out of them.