It started a while back i never could find what and where it was coming from i only knew it was from the pass side sounded like a light pop insde the header, so after swapping the 6al for a 7al3 and looking near the valvcover i see sparks from the spark plug porclen to the hex ( metal area ) of the plug so i swapped that plug out and walla it cleared up the motor smoothed out and no light popping no more exterior sparks, i learned as a kid to watch a engine run in the dark and look for bad wires etc. i guess i should remember simple basic troubleshooting. just thought id share the info

I had a an Autloite AR plug do that last year on my Bracket car.It was new out of the box.First pass it sounded like a lifter ticking .When i got back to the pits i raised the hood and saw a lite show between the plug and the head .Fortunatley it was a night time TNT or i wouldnt have seen it so easily ...