Hi
Regarding calipers
Stanza, 200B, have the same caliper mounts

Cup sizes I think they are all the same cup sizes

Stub axle bearings Stanza, Bluebird, 200B, R31 Skyline are the same bearings

Stanza Lower control arms same as Sunny and 120Y.

I have a Sunny Coupe with Stanza Struts and Stanza brakes. I definately know that the lower arms are the same. Although the smae size springs are in the 1200, 120Y, Sunny, and Stanza. Now that should give you anm idea of the different Spring rates and Sway bar sizes. 120Y sway Bar is a good bar for the 1200. 200B has a good pad area on their calipers (Girling) with 200B rotors. Apparently they're a good thing on a budget. Slotted DBA Rotors and good Pads makes a difference.

Hope this helps

See Ya soon