Best bet on rear suspension?

Though the rear axle selection is quite vast at best, I'm figuring something like this for the rear suspension:
http://chucker54.stores.yahoo.net/mansupstocsp1.html
http://chucker54.stores.yahoo.net/sprinrelkit.html
http://chucker54.stores.yahoo.net/catrbarsy1.html
http://chucker54.stores.yahoo.net/noname45.html -if needed
http://chucker54.stores.yahoo.net/adpinsnib.html -one of the top two
http://chucker54.stores.yahoo.net/comengbodlon.html -think this is correct
http://chucker54.stores.yahoo.net/manciniracing10.html

How would something like this work on a big block Duster with manual tranny?