Oddball car - swap to disc - ideas?

To get some facts straight, a-bodies built after December 31st 1975 all had disc brakes and big bolt pattern regardless of engine or options.
From the start of the 1973 model year, all V8 a-bodies had big bolt pattern and disc brakes.
From the start of the 1973 model year, all slant six a-bodies had big bolt pattern and disc brakes ONLY if they were ordered with power brakes.
All non power brake equipped slant six a-bodies from the 1973 model year had small bolt pattern 9'' drum brakes until January 1, 1976.
All a-bodies older than the 1973 model year had small bolt pattern brakes regardless of options. The only exception to this rule was the factory Super Stock Barracudas and Darts for 1968, which were all big bolt pattern with retrofitted b-body parts on them.