Tuning 600cfm holley for 305 engine input needed.

[Shaker455]

Start off by keeping this very simple and do one adjustement at a time.

1) Remove the carb and set the front and rear throttle blades evenly.
More than likely the front is up too far on the transfer slot and causing the rich condition.



2) Set both idle mixture screws to 1-1/2 turns out to get the car fired.

3) Adjust idle stop screws for desired rpm in park

4) Use a vacuum gauge and set for best vacuum keeping mix screws even.