Clean 12v switched source that is hot cranking and running

cdwmotorsports said

I already have the power, ground and fuel pump wires for the EFI ran I am merely trying to get a “clean switched 12V source”

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No one on these forums knows what your wiring looks like. You will need to find the IGN 1/2 wires that, I’m assuming, connects to your MSD ign box. Pull it from there.