D-Body Kelsey Hayes Pin Style Caliper Adapter

I am hoping to upgrade the brakes on my 71 dart which currently has drums.. I am looking for some confirmation/help on a couple of things. My hard parts plan is -

76 - A body spindles ( upgrading to BBJ tubular uppers )
11.75 rotors off of an F M or J body
Calipers off of a 70 Imperial Kelsey Hayes Pin Style Caliper

I am running a factory sway bar so I think i need to stay with rear mount calipers..
Do I need a special adapter or is there a factory part for the caliper mount?

Calipers won't work.
They are for a 1.250 inch width rotor, on the full size cars, "C" body and Imperials.
You require calipers for 1.000 inch rotors.
Caliper mounts off 76 up, Cordoba, St, Regis, Magnum, Newport, Fury, with 11 3/4 inch rotors.

(Check in with me about 7 - 10 days time from now.)
I will have a pair of Pin Type mounts off the 76 up cars, for the 11 3/4 inch rotors, for sale.
Bought some parts, and need to get them, from a "lot" parts sale.

ok.. BTW I worked on the Phantoms too, f-4e and f's @ Moody AFB, GA