11.75" vs stock 73+ 10.97" CALIPERS???

well i drove a couple hrs to buy some caliper brackets some guy had to do the 11.75" rotor swap and when i got home realised the brackets are for the smaller rotors which i already have on my 76 dart parts car.:banghead: thank god i didnt order my calipers and rotors yet. theres nothing in the junkyards around here either so i guess ill be using the 10.9" brakes. they will be new anyway. :banghead: