Which Brake Booster??? Help!!

I put a 7/8" D MC from a late 90's Breeze/Cirrus w/ ABS (2 ports, dbl-flare), on a 2-4 bolt adapter plate ($30 ebay) for manual brakes in my 64 Valiant. Many others would work. Many here use an 80's Dodge truck alum MC. 15/16" bore would work too, especially for those w/ strong legs.

In some years, the power MC had a smaller bore than the manual MC. Sounds backwards, but not after you consider the lever ratio in the A-body's stand-off brackets.