What are the effects of a non-hooked up vacuum advance? I looked yesterday at my chevelle.. and sure enough the vacuum advance wasnt hooked up. It was just sitting there with nothing on it. Should i connect it back up? Where are the usual connect points on the carb for this? I have an edelbrock performer carb... i noticed there are a lot of plugged spots on the carb... thanks for any help.

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1972 Chevy Chevelle "Malibu"
Hooker Headers, Flowmaster 40 series mufflers, accel 8.8 wires,Edelbrock performer intake Edelbrock Carb, Torque Thrust "D" wheels
Click here for my Malibu information
In Memory of #3 Dale Earnhardt

 

You'll get lousy mileage and plugs will tend to load up much quicker with combustion contaminants. Also, part throttle will seem a bit sluggish without it.

There's an article on this website that talks about dialing your distributor's advance curve (mechainical and vacuum) if you want to have a look at it.

As for which port to plug into some will tell you a full-vacuum port, others will say a "ported" vacuum port that only supplies vacuum adove idle speeds. I prefer using a ported vacuum source. Test for this by uncapping each vacuum port while idling the engine. A full vauum port will have vacuum present even at idle. A ported one will have no vacuum at idle but the vacuum will rapidly increase as you open the throttle and rev up the enging.