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

Hey guys, i'm doing the 11.75" disc upgrade on my duster and i have the rotors, spindles, caliper brackets etc....but i need to know. Will stock 73+ A-body calipers work with the bigger 11.75" late B-body rotors? I feel like they wouldn't cover enough area on the rotor? Anyways, thanks for all the input! And i'm under the impression my 73+ MC/brake booster setup will be fine...please correct me if i'm wrong? Thanks, Dan