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On a stock engine it’s around 10 so with your cammed engine I’d say 15 maybe. Headers and intake would surely get you to the 560-570 mark. If you think your car sounds nasty now wait until you do the headers.
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1973 Mach 1, 351C cruiser
'15 Z/28 Red Hot, A/C
1980 Z28- resto-mod project
1979 Y84 Trans Am
1986 IROC-Z
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