'68 barracuda ignition switch power on issue

You have two switched ignition wires. Ign 1 is blue, Ign 2 is brown. Ign 1 has power in run position and feeds power to the coil thru the ballast resistor. Ign 2 has power during cranking and feeds the coil a full 12 volts for starting, bypasses ballast resistor.
If your running an MSD you want to splice Ign 1&2 together to feed the MSD box switched ignition input lead. Doing so provides power during crank and run.