trouble adjusting carb

||I am trying to adjust my four barrel carb (edelbrock performer series ||carb w/ electronic choke). || ||I can get my car started and warmed up. In park the engine idles at ||about 1000 RPM. When I try to put the car in gear (automatic trans) ||the idle speed drops to 600 and runs really rough and wants to die. || ||Is it possible that I have set the idle mixture screws too lean and ||the idle speed screw so high that the engine will idle in park, but is ||fuel starved when in gear? || ||How should I start from scratch on adjusting this carb? Should I set ||the mixture screws to very rich and then adjust the idle speed to ||where I want it, then adjust the mixture?

Why don't you set the parking brake, have someone inside with their foot on the brake pedal, then adjust for a good idle in Drive. Then go back to neutral and work on that angle. Rex in Fort Worth

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Get a vacuum gage and adjust for highest vacuum and lowest reasonable rpm, at the highest load idle, such as, being in drive with air conditioner and high lights on.

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Jim- The cam/lifters were replaced about 12 years ago with a cam that was near stock specs (dont ask for specifics, unfortunatley I dont have the info available.) Kevin