OK, a little update..
I went upstate to a friend's shop (I ususally try to limit my favor asking to important things but..).
As it turns out (looking at the diagam, the trigger wire goes from the radio to the fusebox (and door chime relay), then to the ignition.
The wire I spliced into is behind the fusebox so I not sure if before or after a fuse (my guess is before), but the entire length of the wire can carry current (not burned out). Next, by grabbing the wires near the plug on the ignition a bit forcefully (you have to, or they won't even budge) WE HAD POWER! It went away when you let go, so unless I jam a screwdriver in there to push the wires while I drive, I'd have to change the ignition's electrical part (only a little burned out)
Now the question is.. perhaps I inadvertantly grounded the wire with the tester and burned out the ignition so if I replace it it'll be fine.. or.. maybe the draw is too great. I'd hate to replace the ignition, just to go and do it again.
According to Mitchell, the steering wheel has to come off and I might even have to drill out the lock (and put either a nut and bolt or rivet to put it back.. I didn't really read past 'take of the steering wheel'). Whatever the draw is, it must be minimal. I would think a fuse wouldn't be necessary. But with all three things (the amp the radio and the door chime) taking a draw can the ignition take it?
Or should I not even chance it. Fix the ignition and hook up the amp trigger from the cig. lighter or something (to be on only when the key is on instead of in). There is no antenna out on this model (maybe its another reason to get a new radio)
So far, you guys have been great.. which way should I go?
