I would guess that it depends on how much you need to go to your new ignition switch or whatever you are connecting to the 2 #11 wires...how much draw they will have.
The factory wires are 14 gauge with thick insulation that is the same as 12 gauge wire...so whatever the max safe amp load for 14 gauge wire is what 1 stock #11 wire will flow...if you need more than that, use 2...
Hopwe that helps...
Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.
Pro-choice, that's a LIE, babies don't choose to die!!