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Any plug diagnosticians out there? How do they look?
The one thing I did notice is the lack of consistency of manufacture in these Autolites. At least 2 of them have different height insulators and slightly different width center electrodes. That doesnt make for a smooth running engine. At least the NGKs all looked the same.
Plugs 2, 4, 6 and 8 are on top from left to right and plugs 1,3, 5 and 7 are on the bottom from left to right.
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Looks like #4 has an extra gasket too.
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#1 is burning the best and it also looks like it has the closest gap........
#2 is the worst, very rich. #5 is close, also rich.