Electronic Distributor Upgrades

Considered the BEST upgrade you can make to your A-series engine -- it increases reliability considerably. Advantages of electronic ignition include:

No points to wear out, no dwell to adjust. Otherwise you are supposed to change the points & condensor to NEW every 12 months. Nissan EI is nearly foolproof as failures are extrememly rare. Points will always end up giving you trouble eventually.
High-energy spark -- uses full 12V coil (no ballast resistor), and can drive large gapped spark plugs for better firing
Additionally, Nissan versions have this advantage of using Larger Cap -- less chance to crossfire (important in humid climates)

For converting your A12 to electronic ignition, see:

Electronic Ignition