If you are into spending cubic dollars as a basis for improving your car this (Schwarts Performance $$$$) is definitely the way to go.

There are also these alternatives if your into the package deal systems:
http://www.hotchkis.net/search.html?Make=49&Model=1338&SubmitForm=Search

http://www.xvmotorsports.com/products/index.cfm

http://firmfeel.com/b.htm

Get AndyF's book on the B body handling and read all you can on this forum on Moparts and other locations on Mopars that handle. You dont need to put a full frame under your car........if that is what you want to do well then go ahead and do it but its not required just because Schwartz says sooooooooo