dark plug on cylinder 6

Alrighty. Good step in the proper direction. Checked vacuum at the choke pull off hose. 18.5 and very steady. Good sign there. Decided to lower my float height just a hare to see what would happen. Drove for about half an hour today and it's much cleaner. All the way down the porcelain with city driving and no adverse effects of a hare lower fuel level. Idle smoothed a bit. So onto the heater box gasket next.

thanks for all the suggestions