the reason why i ask for this diagram is because im using a msd ignition and coil, both external applications, and need to wire two wires into the distributor.

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Red Wire (on MSD ignition) --connects to--)> Ignition 12 volts, black/yellow wire original coil (+)

White Wire (on MSD ignition) --connects to--)> Trigger Wire, white/blue wire, original coil (-)
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i know that I wont be experiencing much if any extra power from using these, so dont flame me on that please , i have the parts and just want to install them. I have a couple questions though.

1) Do i have to disconnect the stock ignition? And if so, how?
2) Am I correct in thinking that the tach wire is the blue one? That seems familiar to me for some reason.
3) there was an MSD coil installed before (using the stock ignition), its gone now, but there was 2 wires running into the distributor from the coil, one to the white/blue point and one to the black/yellow point. This was installed before i got the car. There is a black/yellow wire that was spliced in (@ the black/yellow point i think), should I splice that in to my new setup (with external ignition)?