bah forget the stanza or 120y??? struts. if you go to the effort of buying a 180b you might as well use the struts off it, just cut the spring perches off and weld smaller ones on, then surprise surprise you will actually have suspention travel

then you could go for the volvo calipers....but they are the most homosexual calipers ever made...when you have to machine down the hub and can only fit 13 inch mags or 14inch steel rims on a 242 mm disc.....its not worth it, go commo v8 calipers and verada 274mm discs(will fit under 14s), you can then later upgrade straight to VT twin piston calipers

and as for diff, use the 120y BW and try and find an auto tailshaft to suit as it might just fit if you use a sss stanza stumpy or a stumpy skyline box