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I just don't think it's worth it - and I hope you get to the bottom of the problem that caused this. When there was leaded gas, plugs really did get bad in 10K miles, and in terms of real money, I think plugs in terms of $ per mile were more expensive in the 60's than they are now, so more people cleaned them. One of the big hazards of cleaning was getting ALL of the blasting abrasive out of the plug after cleaning. ALL of it. Sand in the combustion chamber = not good.
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