A lot of people are making some good points here for safety and tuning etc..
Having said that, when I installed my first kit back in the 80's , all I bought was the adjustable kit, a Holley blue, some wire, a micro switch for the carb, an arming switch, points switch and relay and a twin point dizzy conversion plate so I could switch between one set of points to the other to retard the timing. Plus a spare pair of underpants.