1200 castor rods need to be modified to fit the stanza control arm. the bolt spacing is wider on the stanza control arm/ball joint. if you slot the rear-most hole of the 1200 castor rod you'll be ok. the front hole can adequately locate the control arm/strut.

the other option is to use the stanza castor rod, and shorten it - alot! but its easier & cheaper to modify the 1200 castor rod - you can do that with a small round bastard file and a vice.

I have my '74 120Y apart,and those cator rods are the same as 1200, and will not fit the stanza control arm/ball joint without modification. I haven't seen the late 120Y stuff that people talk about on here to comment on that.