I put the Hotchkis front sway bar on my 66 LTD, best improvement I have made so far.
I swapped the single circuit master cylinder to a dual circuit master to suit a 67 Galaxie, otherwise the standard disk/drums work fine. However, I am looking to swap the 4 piston front calipers to a 2 piston caliber from a later model to give me better wheel clearance. I currently have to use spacers to give me clearance on the front brake calipers, so I can run the Cragar wheels I’m using.
My car is a Q code 428, stock apart from a set of Hooker headers and 2.5” dual exhaust. Replacing the log manifolds with headers made a very noticeable difference in the torque. I like your plan of a “stock appearing” 445. My car also has the 2.8 rear gears, makes for a great highway cruiser. Build the engine for torque in the practical rpm range you will be using, will make for a great cruiser.