Kim,

Re: lots of 15" disc brakes on vans in South Africa,  I am sure that you
are correct.

I was just thinking of add-ons in the U.S. and trying to be
conservative.   I wrote, then deleted thousands, not wanting to
overstate incorrectly.   I don't know if the factory made any
modification to up size the rear brakes, but suspect that they didn't
because upgraded stock size drums were available through the SA group
purchase some years ago.  IIRC, that was one of the early sources of the
15" size disc brakes.   I have both the SA 15" front discs and these
rear drums on my Syncro.

Sam

--
Sam Walters

Baltimore, MD