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You can also try 100 octane unleaded race fuel. 76 makes it and are commonly sold through pump stations. You might about to call 76 to find out a station near you. It should reduce if not eliminate the pinging. You just have to try it for about $5/gal to see..


The other thing is to try a set of colder spark plugs. The service manual recommends heat range 7 spark plugs if high heat or high speed driving is common. It should also reduce pinging.


Eddy


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