Technical Adjustment for 2GC Dashpot

I want to adjust the vacuum operated dashpot on our 1965 Pontiac 326 Rochester 2GC carburetor, but my best research cannot seem to find an exact model like mine.

Mine has only one idle adjustment screw, (drivers side) and no fast idle screw.

The closest instructions illustrate a fast idle screw on highest step of fast odle cam, but ours has no fast idle screw.

On our model, that singular idle screw does interact with a 3 step cam )right next to the screw in photo), but im not sure the same rules apply.

 

According to a Factory Service Manual from 1965 on a Rochester 2GC, to adjust the dashpot.
With the engine in the correct slow idle position, fully compress dashpot and adjust to obtain .060 clearance between dashpot plunger and throttle lever.

 

Thanks a million. I greatly appreciate it.