I used to be in the Granada, Monarch, Versailles club. Rear discs were standard on Vesailles and an option on Granada and Monarch. It was a neat cheap way to get rear disc brakes in the 90's for brag appeal. Heavy, obsolete parts, wierd set up etc. IMO scrap today.
By the way I have a 70 Torino GT vert and scrapped one years ago...I'm sending you a PM.
My '64 1/2 vert. Ordered May '64. D code 4 speed, handling package, caspian blue, accent group, Ford blue manual top.
'68 vert. driver. Owned since Apr '78. C code AT, AC, PS, P disc B, PT lime gold, standard black interior and top. NOS RF fender and left quarter.New top and folding glass.