The headlights
The master cyl may bolt in, but it's a different size internally. The clutch master might be the same.
I think brake shoes, drums, fuel filter, clutch slave from a 210 (b310) are the same too.

Not many interchange as identical, however, some parts are used to up grade the B110.
The engine (a14/a15),
trans (5spd),
radiator(some models are bigger),
alternator (larger or int. regulator)
oil pump ?
fuel pump ( needs modification for A12)
210 struts ( more cartridge variety and slightly larger brakes)
210 lower control arms (for the 210 struts or to 280zx struts)
I don't remember what else. This is not THE answer, it's just an answer.