Ignition Help

I am running msd6btm, msd distributor, msd wires. The problem is the little black conductor in the top inside of the cap keeps disintergrating. The last cap I put on was about 3 weeks back and I think its going bad already. I will go out in a few minutes and take it apart and check again. Any ideas?
Thanks in advance, Dan

Oh and on a different note, My engine is a smallblock stroker with 10lbs boost. I am running an M1 single plane with a 2" 4 hole spacer. I get so much wheelspin so I was thinking of eliminating the spacer to slow down the low end torque. Would I loose power also, or would it just move the power to a higher rpm?