Sway bars?

Anyone ever used these sway bars from ebay? If so are they good, and do they offer any improvement?

http://cgi.ebay.com/ebaymotors/NEW-...25645673QQcmdZViewItem?hash=item130225645673&

They are pretty cheap, about the same as a name brand front sway bar from summit racing. If they are good, I might try them out. I'm not looking into making my car a track handling race car, just looking to improve the handling a little.

And since I have a 73+ K-frame and an 8-1/4 rear, do I use the 73-76 kit even though my car is a 71?