I took the liberty of checking for possible technical service bulletins related to your question, and unfortunately there were none to be found.
The coil on your vehicle is housed within the distributor and this is a very hot environment. We can't change that.
But in order to help reduce the chance of premature coil failure, there are a couple of items that can contribute to the coil failure.
High Secondary Ignition system resistance can make the coil work harder and hotter.
Be sure that the Distributor Cap, Distributor Rotor and Ignition Cables or Wires are kept in the best of shape by replacing them if there are signs of wear or carbon tracking.
Be sure Ignition Secondary Cables are in good shape. If the resistance is 7k ohms on 3 wires and 14k ohms on one, replace the wires. Plug wires can look in good condition on the outside and the resistance can be higher than it should be causing additional strain on the coil.
Be sure to use the correct spark plug and keep them at the correct gap specification.
|NGK Type ||BKR6E|
|Nippondenso Type ||K20PR-U|
This is about all you can do to reduce the work load on the Ignition Coil.
I hope this information helps.