Quote: "Never gun the throttle lingage on the carburator when adjusting the idle speed because the manual for your 75 Chevelle says to adjust it in drive.
Never do this if you're adjusting the idle mix on a 66 Charger, while it's in reverse with the parking brake holding it back. Gun the engine once, & the car moves back about 1'... just enough to stop the car right on... one foot! The only way to get it off? Gun the engine again...!
The only way to get it off? Gun the engine again...! 
