Lights flicker and gauge jumps around???

...I don´t have miss or backfire issues. Only the flickering. voltage /lights
I will "rewire " everything once again today... I am thinkuíng about the BROWN Wire that is comming from the IGN Switch.... Because I use a relais to feed the MSD RTR
I think I only need the blue wire.... from the IGN switch... because as soon as I turn the key to the RUN Position I have 12 V on the Coil /Distributor... so the brown wire is useless.... and perhaps creates something like a interference... also my coil is 3 feet away from the Distributor... on the inner fender...I will relocate her...back to the firewall...( close to the Distributor )

Greetings Juergen