Thank you for asking your question on JustAnswer.
Your 390 requirs a set of points, plugs , condensor . Due to age I would also do a new distributor cap as well as a new rotor and a set of spark plug wires and a fuel filter.. The timing is set at 12degrees BTDC, the plugs are gaped at .035 and the points are gaped at .017.
ok so if you would walk me through real quick putting on the new condenser, rotor, and cap