[Chevelle-list] vacuum

[Jim & Chris]

where is the best place to check the vacuum and what should it be ? 15in.? I have 6in. of vacuum at the timing advance port on the carburetor.the timing is at 8 deg. BTDC .when I unplug the vacuum advance hose nothing changes. idle and timing remain the same and the car is driveable and seems fine. Jimmy.C
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