Burning tips off plugs

Thanks for all the info.
Headers where not glowing red (LOL)
It is the ground strap yes.
Timming is at 36, we had it at different places on the dyno, this was the max HP spot.
By the way, it' s a MSD 6 AL with Mallorey coil,stock dist.locked out, same thing I have ran on the motor for years.
I will look at the plugs closer. I have a lighted mag.
I am changing all the plugs tommorow, so I can see them all.
Darn TTI headers make it hard, but worth it. I made holes in the P/S splash pan, so that helps.
5 up numbers on the jets would be too much. We set it up slightly to the rich side (not rich) so I wouldn't have to mess with it in the summer nights, or when I ran at Seattle which is sea level, which is not 3000' like here.
We did play with larger jets, but lost 10-15 HP.
I'll post a pic then too.
I'd be talking to my Dyno guy (Dr. Phil) but his mother died yeasterday, and I am getting the car serviced to race.
By the way, it runs fine with the burnt off electrode.I made Queen of the track (runner up to King!) at our track last time it ran in the fall, and it ran the fastests it's ever ran (I broke out more on a double break out) Maybe we are on to something. You think?
Thanks Guys