Easiest electronic ignition upgrade?

Pertronix by far is the easiest to install.

Just remove the old points assembly and condenser and replace with the kit. (It's all explained in the instructions)

Just remember to use a magnetic screwdriver when removing/installing, you DO NOT want to drop the small screw down into the distributor, then you have to remove the whole distributor.

With the Pertronix kit, the ballast resistor is no longer needed. I also changed my coil to handle the new system. Pertronix also makes a coil specially made for their conversion kits.

Overall this makes daily driving reliability much easier, startups are a lot faster.