Street driven vehicle. New plugs with some idle, cruse. Made a few hard runs, then drove back to the garage and pulled the plug out. 91 pump gas. Going to take it to a chassis dyno later this week, so I will try to stut it off st the end of a pull and check them.

Porcelain closup

Another view

Supercharged sbc, 10lbs boost, intercooled, efi. NGK TR6. What do you think?