Front Brake Caliper Identification help !

Hi,
Trying to figure out what year and model car these calipers are off of.
The were mounted on a 73 and up v8 kmember in a 69 dart.
10.98 rotor
I was told they were from a 74 duster, but I dont know where to go to reference the part numbers.
If I am to run these, I have to rebuild them as they have been sitting for 12 years outside on the car with the hoses open to the air.
Considering going to the 11.75 set up, Do you need new calipers when you do that or just the adapters ?
Anyone know what these are off of ?