Need Splicing Opinion

Ok, I have practiced splicing and soddering wires together. Now rather than ruin my ignition wire which (which is a pain in the ass to get too) I am wondering if I can splice a wire into the alternator to get the full 12v's needed to power my Pertronix Flame thrower coil. I do not know which wire to splice into if I was to do this, but if anyone can think of any other area I can splice into I would appreciate it.

The main reason that I dont want to tap into the balist wire is because my alarm system has a kill switch spliced into the ingition wire somewhere that I havent located yet. Also when i removed the clip from the plastic cover on the steering colum, closest to the dash, I thought it was gonna brake as I tried to take it off. I noticed a collection of wires covered by a grey plastic sleeve. Now would the wire be pink(or red) and inside this sleeve? I would like to leave this steering mess alone and try to find a fuse of some kind in the engine bay that carries a constant 12v while the car is running that i could tap into.