Electronic ignition conversion help.

how hard is it to get the whole ignition conversion installed? thats the first thing i want to do on my car. i dont want to put any stereo equipment thats worth anything in my car until i get the electrical system worked out, at idle, the voltage is horribly inconsistent.

but i want to convert it to electronic ignition, and i was wondering how hard i could expect it to be. how long does it usually take to install too?