My sbc in my chevy c10 is bogging or sputtering when im around 30% throttle or more. I thought the carb was dirty, so I bought a brand new holley carb and no change. I put a fuel pressure gauge on the fuel line and it read 9 psi. I bought a holley fuel pressure regulator and dropped the psi to 6 and no difference. Then I dropped it to 5 psi and still no difference. The spark plugs were changed and the wire are in the right place. What am I doing wrong?
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