I chopped the #3 plug, as it looked the leanest. There is no fuel ring at the bottom, the whole insulator looks as white as the pictures. So it's lean and plug range is hot. I guess leaner is meaner, because it's been running awesome in 50F-60F weather we've had here.
Should I give the NGKs a rip around the block and see if they color up, or go immediately to adding fuel?
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I could explain all this to the girl at the parts store, but she'd probably call the asylum.
White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
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