u can use s13 at the back or upgrade to r32 skyline brakes all over the hub will fit good in the hilux diff since 5 stud nissan and 5 stud hilux have the same stud spacing.
hilux diff i would go for a 4.1: 1 or 3.9:1 u can find its code at this forum.
hilux diffas for the master cylinder u can use the 15/16 sold by datsport.com it will be perfect and u will have a good breaking machine.
any other information u want just request it. same work is being done on mine