If its a jap diff it will be a B-code. They came in ke1 and early ke2 + some early publicas
U-code jap diffcenters will also fit the housing and axels. They came in ke2 ,ke3, ke7 ,late kp61 starlets, AL25 4x4 tercels.
Kp60, kp62 and early kp61 came with x-code diffs. u and b code axels don't fit these.
Some if not all aussie assembled cars have borg warner diffs tho . I know nothing about those but doubt they interchange
with jap stuff