<VV> Spark plug?

[christopher d czepyha]

How do you know if a spark plug is bad.  Since I am re-working the wifes
63/pg I figured I would at least check the plugs.  Other than being a
medium shade of brown they don't look much more worn than the new ones I
have.

They are autolite 275's.  Is this a correct plug. I think its a 102.  2
Carb.

Thanks.

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