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Spark plug gap?

91z

New member
I have an 04 gtp comp G. its ten over with 9.5 to 1 compression, a VS cam, SD headers, 3/4" Spacer, water meth, and a 3.4 pulley. Im running NGK TR55 plugs. I was wondering what I should gap them at with the extra boost and compression?
 


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