Factory 4 wheel disc brakes on an early A

No such car as a Valiant "S", and NO "Mopar" car from the 60's or early 70's EVER came with factory rear disc brakes!! He must be mistaken, and I would love to see a pic of the setup he claims to still have, my money is that it's the fronts!! Won't be able to produce any information, pics or part numbers for the rears, cause there wasn't any!! Geof