Thread: 305e Holley 500 swap question
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Old October 19th, 2019, 12:49 AM
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Default Re: 305e Holley 500 swap question
I did not change the power valve but I did use lower number jets. I believe I used 68"s.
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1961 GMC Suburban 305A Overdrive
1962 GMC Utility 305D
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