air or fuel, what am i running out of

Gator said

I am running a .508 Purple Cam with 901 single springs and I have tacked out at 7200 and did not and have not had any problems...

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If it's the .508 hydraulic, you need to get your tach checked. Ain't no way you get 7k plus with squish lifters. Unless you spent an assload on lifters.