Let me ask a few questions.
1, are you running the stock oil injection or have you done the tors delete ?
Why, I ask. the stock tors, has the idle screw on it. to get to it, its under the seat. look for the big flat head screw.
If you have a after market or different carb top, No tors. then to have it idle right, a idle screw would have been or needs to be installed into the left side of the car. they sell this part / kit.
on stock carb, on the left side, there, the only screw is the air screw adjustment. this usually is set from 1 1/2 to a range of 1. sometimes 1 3/4 on a stock blaster.
but this is not your idle screw.
Sporty