the street ride will come from th ecoilovers and the spring rate.
the launch and handling will come from the suspension.
only a parellel sp?? 4 link will not bind..
if the links are not they will bind a little...with rod ends it might be noticable.....but with bushing ends you would never know.
if your going for simple just inboard the leafs....
if your ganna hack it all and build a suspension do a 4 link...totally adjustble and will launch better than a ladder.
if your just ganna cruz it and dont care about launches or accelaration...any will work..
just my opinions...