First off you need a 12 volt coil and a resister.
This setup works for me.
Its a 12 volt coil for a 68 chevy pu and resister for same.
The yellow wire is power wire,thur resister,then to coil pos the neg you can,t see goes to dist.This coil fits holder thats why i us it.
Use neg grd and 12 volt.Yellow wire to pos by way of switch or clip for quick disconnect.get a selinode for starter.
Just run off battery no gen or alt.