Idle speed is set by the PCM and is not adjustable. The screw you are fiddling with is just the stop screw to adjust the initial throttle plate position, it should not be used to attempt to adjust the idle.
It's held on by one screw in the hand hold.
The bulbs screw in from the rear. There are screws holding the light assy on and youhave to take them out to take the light off.
The belt is tightened with an adjusting screw.
The distributor has only one plug and one screw. You should note the position of the adjustment slot and the exact position of the rotor, and make sure the new one is put in exactly the same.
The speed sensor is on the top rear of the transmission. It is held on by one screw.
it is the large screw with a temperature check pod on it right above the throttle spring
Just use a flat head screw driver to pry it off.
It's mounted to the top of the transmission at the back. It has a two wire connector and is heal on by one screw.
Loosen the tensioner locking bolt and and back off the screw. Consult a manual if you are not familiar with how to do this.
Remove the screw from the lamp(under the hood). disengage the assembly (it has snaps on the bottom) by pulling straight out. Turn bulb socket 1/4 turn to remove.
the fan belt has an adjustment screw by the power steering pump.loosen the adjustment screw belt should almost fall off.
The 1985 Chevrolet Corvette rocker arms will have an adjustment screw on top of each rocker arm. Turning the adjustment screw will change the height of the rocker arm.