[El Sol Infinito]

I'm getting set for spring and I'm going to get the brakes up to par before doing any real driving.
I know that I need a new booster. Napa has direct replacements listed for 115.00 w/o the master cylinder and 125.00 w/ a new single reservoir master cylinder. Seems like a no brainer to me, I should just by the whole unit w/ the master, right?
Well, if I'm going to do that, why don't I replace the setup with a dual reservoir master for safety? I'm wondering if I could just bolt on the Napa booster/master setup for the 1967 t-bird and do a little replumbing of the lines?
Anyone out there done a dual master cylinder conversion and want to share their method/techniques?
Is what I have in mind at all feasible?
Thanks in advance for any help.