I was on the fence about buying a Firecore distributor for my 511, but all the issues I have seen on here and other sites makes me look all the harder at the Pertronix. I had issues with my MSD billet as well til I added the crank trigger. I can say this thou, Firecore wires are nice.

http://www.youtube.com/watch?v=aIxaesJ190U

http://youtu.be/lCZAaN7fFLg