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Typically about 8.0:1-9.0:1 is waht most people run compression at for boost.If runing over 16 psi then go with 8.0:1 if gonna run a S/C around 10-14 then go 9.0:1.Everyone seems to prefer the Eddy heads but if you can get the R/T's for a good price then they are a good choice.I'm running LOW 11's with ported R/T heads on mine running spray.


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