Re: 306 or 347?
sounds good man, it should run real strong. altho i will say im runnin gt-40 heads an the "outdated" xcam and am still runnin high 11's, with the factory fuel pump  .. so u should be able to hit ur goal.
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347- ported X heads, Xcam , RPM air-gap intake, 650 holley DP, 10:5 comp., equal lenght shorties, pullies, MSD ignition, pro 5.0 shifter. stock fuel system !!
best ET: 11.95 @113 1.64 60 foots
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