1972 dart converted to 11" disc brakes,what do i use?

Are you talking the 10.980 rotors or the 11.75? The 10.980 were from what I can tell pretty standard on all Aspens etc with small blocks...the 11.75 seemed to come in bigger cars like a big block cordoba...so thats where you would need to look for the brackets...trust me I have been looking in all the wrecking yards and craigslist and have yet to come across anything for the 11.75 rotors...just dont seem to find these cars in the yards it seems...