Make sure your choke plate is wide open when the throttle is wide open. Adjust rod if necessary. Set the inner fast idle screw onto the 2nd step to your left from the rear of the carb that's where you set your high idle speed. When you push your foot to the floor it will set the carb at your high idle then you tap the throttle to kick it off and down to curb idle speed.
Set the outer curb idle speed screw so its just touching the stop and turn in maybe a quarter more.
Both idle mixture screws turned out 3 turns should ensure a start.
I used an external tach and a vacuum gauge, so the highest vac reading and idle by adjusting mix screws, then set idle speed. Check timing as my vac needle was a little bouncy and proper timing and mix adjustment brought a steady vac reading of 19" at idle.
So I'm at about 21 degrees timing, 19" vac at idle and my idle speed is steady 680 rpm smmoooth as butter, no pinging with pulling I6 power. It's so quiet I think its stalled again until I look at the tach.