[V8Vairs] Backfire through the carb...

[Ed Dowds]

Tony-
Check to see if the vacuum advance hose is hooked up to the vacuum port on 
the driver's side of the carb. If it is hooked up to the pass side port you 
loose the vacuum advance as soon as the throttle opens. The pass side port 
is called "ported vaccum" which is not normally the one you want for a Chevy 
engine.
                Ed

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