i have a 1200 wagon which came standard with drums all round.
i put the disk brake struts off a coupe into it and it stops really well.
B110's are hardly heavy so the tiny ass brakes stil work effectively.
Obviously if you are doing engine conversions or just getting more power out of your a series etc then you are going to need better braking than 1200 coupe brakes and it seems that stanza brake upgrades are common in aussie.
Alternatively you can do a s13 brake conversion onto 1200 drum struts with some messing around (not to much tho).

Search the 1200 wiki and this site. im sure you will find heaps of info on the subject.