Use or don't use vacuum advance on distributor???????????????????

If it's working properly it, wont advance on top of your mechanical advance under hard throttle. it should only advance under light loads. this helps emissions and mpgs slightly. I think it can also be adjusted as well. But like I said it only advances under light throttle, so at WOT it will only advance mechanicly. If you really wanted to delete it off the stock distributor you just take the vacuum line off and plug it. I hope this helps.