Brake booster swap / 64 Dart GT, 273

Hi everyone,

I need to replace my failing brake booster. It's a hard to find diameter and was told that it's possible to get one that is a different size and use an adapter plate. Wanted to upgrade to dual master cylinder as well.

Has anyone done this and if so, can you direct me to the part(s)?

I heard you can get 'em from Summit, but I have no idea what one would work.

Cheers,
Bill