Converting from Power to Manual Brakes

Hey all.

I'm looking to convert my car from power brakes to manual brakes (73 dart swinger, 340 4-speed; Front disc, rear 10"x2-1/2" drums. All new braking components all around). I know I will need a new master cylinder. It looks like the option is either a softer pedal with more movement (small diameter master cylinder) or harder pedal with less movement (larger diameter). Would somebody mind offering advice on which works better? Also, what diameters are available?

Next,
I know I will need a manual brake pushrod for my existing pedal. Does anybody have one of these pushrods laying around?If so, I'd be interested in buying.
Thanks

-Mike