Manual disc brakes vs power disc brakes questions

I am also thinking of dumping my booster for manual disk on my 73 Dart Sport. Can the master cylinder I have bolt to the firewall and use the other pushrods? If so where can I buy one??

Thanks!!!

You need a manual brake pushrod. And can use the power brake master cylinder and attach it to the firewall. However i think there is a specific manual brake master cylinder for front discs without power brakes. Its bore is different i think its smaller If that all makes sense.