1970 Dodge Charger originally came with power drum brakes. Was converted about 35 years ago to power front disc brakes. I built a motor about 15 yrs ago and didn't have enough vacuum for power brakes so I pulled the power booster out and been running manual disc for yrs. It's time for a new master cylinder and wondering which one to use. I am using Raybestos #7008 10.97 rotors and the Raybestos #RC4065-66 single piston Caliper all for a 1970 Dodge Charger. I was told to use 15/16" Master Cylinder MC36406 off of a 1973-1975 A Body. I was also told to use a 1" Master Cylinder MC36400 off of a 1973-1977 B Body. Any suggestions?