go with 11:1 compession, You can run that on 92 octane. That 347 should make 430+ Horse power with those heads and cam. 70mm throttle body will be plenty for that combo, but I'd go with a larger maf, and I agree on the long tubes.
Skyler
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-1989 Saleen Mustang #406-TFS Heads, E-303 Cam, Edelbrock Intake, and more.
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