The Stovebolt Site Forums The Shop Area The HiPo Shop Small Block 3000 RPM monster....and that's all she wrote !!!!

After reading the entire thread, since you have hei, check the rotor for center burn through. The plugs require more coil voltage as the combustion chamber temp increases and the coil buildup duration decreases. This takes only 5 min to remove the dist cap and remove the rotor. Look for small hole under the rotor center.