1974 dodge charger se Perfomance enhancements

[guywantscharger]

Hi
Im in australia and want to know a few things.
Im looking to buy 74 charger se 440 engine.
What Performance mods can I do that fits easy with no need for a mechanic to fit?
What are the best performance brakes? Im looking for a complete set that I can change myself.
Best size muffler set up?
Best performance carb and engine mods.
This wont be a race car just a street car that will go the way a muscle car should.