Datsun 180b,stanza,c210 skyline, 1600 struts have same caliper mounts.
Datsun 180b, C210 skyline have same large cup size -> also 1600, 200B, 240K, 240Z, 280Z, I think the 260Z has the small dia springs.
Datsun 1200, stanza, 1600 have same small cup size - > not 1600, only 1200, 260Z, 120Y, stanza and not sure about Sunny.
Datsun 180b, stanza same length - > I think YES
Datsun 1200, skyline, 1600 same length I think they are similar (Check a shock absorber catalog).
Datsun Stanza, 180b, skyline have same stub axle and bearings -> NO these differe between the models, and there are 2 sizes of 180B ones.

What model stanza had the longer lower control arm. -> I thought they were all the same

Toyota Landcruiser calipers fit -> Don't Know
Skyline r31 calipers fit (recent post) -> Don't know
Commodore calipers fit -> 180B large Axle 1976?