Easy one, just pulled this from the wiki for clarification for you.

The B310 strut swap into a B110 is popular because it is a true bolt-in swap -- no cutting or machining needed. You get better brakes, and better availability of strut inserts. We are talking about B310s with 13" wheels, not those with 12" wheels which have small brakes. All USA models have the large brakes, and all Canada models except A12A Canada models. In Australia, any A14 or A15 powered B310 should have the good parts.

B310: 1979-1982 Sunny