If your stanza struts dont have the girlock calipers you need to get a set of struts that do as these have the big stub axel that allow rotor changes
you should only need some very good pads in the girlock calipers for braking I can do 10 laps around winton raceway with no fad with mine oh and good fluid (dot4)
DONT clamp your springs if anything get some softer 120y rear springs and grease between them
just fit the overrider from the ute springs to the bottom
That is unless your building a drifter
motorsport rotors are going away from drilling as they tend to crack
you can fit trx bluebird rear disc brake set up to a ute diff or go with the bigger drums from a bluebird
I recently set my coupe up with good frount shocks (koni) and bluebird LX progressive rate rear springs in the frount with a standard 120y frount sway bar and a pannard on the diff this seems to have worked well for me just have a little bit of axel tramp in slow speed corners
I also lengthened the bottom arms buy 25mm to give me good neg and caster
thats my 2 cents worth