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Ignition timing on your car is done by moving the distributor, which in turn, moves the cam angle sensor. There is a large range of movement allowed in the mount of the distributor. You have mounted the distributor in an extremely advanced setting, advancing your base timing from 15 degrees before top dead center to something probably as high as 25 degrees BTDC. An advanced engine will idle very high.
You need to retard your ignition timing by sliding the distributor until the idle calms down. Ideally, you should do this with a timing light. You've basically "untimed" your engine, and need to bring it back to factory specs using the standard timing method for our cars.
In a pinch, the engine can be timed by sound if you know what 15 degress BTDC sounds like (I do... Do you? =) ) but really you're going to need to get a timing light. At the very least, you can not drive the car anymore until you've retarded the timing some as it is not in a drivable state.
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