Rotor keeps arc tracing

When you take the cap off it's under everything. At the bottom. It has triangle pieces opposed to each other. I call the one that rotates, the "pole piece". The other one I call the "pick-up coil". The pick-up coil is attached to the base plate of the distributor.  
The pole piece was off. It wasn't right with the rotor. That not all.........  

That's it JW. It's triggering wrong. One part of the inductor thing is off! The "pole piece" rotates with the shaft the other one is stagnant. So it has to matter. When the ROTOR is lined up "to the wire terminal in the cap" - the point on the "pole piece" isn't lined up with the pick-up coil.  

Some of the posts aren't posting.  

Some things I'd like to share for my HEI friends. Maybe why the rotor has shorted out sense I've owned the truck.
1). The ground strap that sits under the coil and makes up the middle tab on the connector in the cap was not grounding to the coil. I checked a couple of old caps in my shed and one was grounding and one was not. It appears they're putting a coating on the coil to prevent it from rusting. The coil that was making contact was older and rusty. Some people say it won't run without this ground. Mine did. ????
2). There was a bundle of 12V wires loomed right under the distributor at the point where the module is located in the distributor. There might have been some interference going on.
3). On my old truck the power wire to the ESC was still plugged into the dist. cap, then the power wire to the coil was lolly chained into that wire via a fancy offset connector. This was like that from the factory. I'm no electrical expert but there was a resistance to ground in the ESC wire. The coil was still getting 12V though. I wouldn't hook anything to the coil supply wire.
4). and maybe most important. I have a bucket full of cheap rotors, coils, caps, modules, etc. Don't go cheap on the electrical parts.  

Well, hope you got it and as a general rule, use the brass terminal cap (usually blue) and high quality rotor.