can someone please explain why you need to disconnect the vacuum advance on the distributor before you set your timing?
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67 Coupe 289, 2 1/4'' pipes w/ Flowmasters
Edelbrock 600 cfm 4bbl carb, Edelbrock Airgap intake
Hooker headers, MSD Ignition system
Next: new tranny, T5 or Toploader
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