65 Barracuda converting to double master cylinder

It should. Don't see why the distribution block fittings would be any different between A and B bodies. AFAIK differences would be between single and dual MC (extra port), and between drum and disk 1973-up, when the proportioning valve became part of the block (drum and disk different).

Thanks for lots of useful information....another question concerning single to dual master cylinder. (drums) I have a 67 Charger parts car. Does anyone know if it would work to install the brake block from that car and use it on my 65 Barracuda when the new dual master cylinder goes in?
Thanks again for the great help.
Pat