Sunday, I had my car blessed. MUCH smaller than the California show. I've been having a bit of trouble tuning my first engine build, so I let him sprinkle the holy water on my engine. Anyway, we left. As I was running it through the gears (NEVER exceeding the posted speed limits) it died & backfired. After pushing it the mile home with my girlfriend driving & my 4-yr-old nephew working QC, I found I'd sheared the dizzy gear roll pin. -For the second time. I don't know. I'm no expert. Any hints? 351W. Melling hi-flow oil pump. Edelbrock Performer RPM cam. Mallory UniLite dizzy with the gear from the original re-build dizzy.