Early A, 9”……if it was yours, take $ out of the equation, whats the best solution for brakes

Agree with the above- CALL Doctor Diff. He has most everything you'll need, by calling him he can walk you through the part selection process and current availability. Very friendly, helpful and knowledgeable.
Just a rough list:
10.95" Front Disc Brake Kit (Stage 1) -will accept 14" wheels
or
Mopar 11.75" Front Disc Brake Kit (Stage 2) - only $25 more, but requires 15" wheels or larger
Mopar 1 Piece Proportioning Valve
Mopar Front Brake Line Selector for A/B/E Body
Bendix Style Dual Diaphragm Booster for Mopars (order version for later A body)

And for the rear, your best bet would be to get a '73-'76 A body 7 1/4" differential, which gives you 10" drums and 4.5" bolt circle; and does not require different shock plates/U bolts, parking brake cables, or any driveshaft shortening or adapter U joints to fit- which can be an issue since your '65 uses a ball & trunnion front joint and many driveshaft shops don't like dealing with those. It just bolts in. Sure Grip a plus if you can find one.
Second choice is (depending on availability):
Mopar Axle Pkg 7 1/4" A-Body 5X4 1/2" Bolt Pattern (pair)
Next choice would be an 8 1/4 rear from a '73-'76 A body, which gives you bigger brakes and 4.5" bolt circle, but requires different shock plates, U bolts, and driveshaft shortening.
Last would be an 8 3/4 A body rear, which requires the same as an 8 1/4, plus big bolt axles and brakes...
Or a Ford 8.8 is a possibility- 8.8 swap
Just a few ideas to get your creative juices flowing.