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ok i have 10.2:1 focus central pistons what size gasket should i use to get back close to stock ratio or should i use stock gasket and just get it retuned??
 

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about .030 over stock should get you down to where you need to be. since when you mill your head .040 it raises about a point.
 

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A SVT head gasket will get you down in that range, maybe slightly higher. It's what I'm using to drop from 9.6 around 9.0-9.1
 
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