Idle mix screws are about 1.25 - 1.5 turns out from bottom. I have the graph but it only shows 3500 RPM+ so it might not be that useful here.

Another thing we may be grappling with is the tune was done with a marginal fuel pump which failed totally shortly afterwards. I also later found the ignition as marginal and had to go to a lower ballast resistor to get the coil output voltage back up. At the time of tune, the output was in the 10-15kV range...new ballast...in the 45kV range. No idea if this will affect anything here or not.

I have thought about experimenting with the cams but I didn't know enough to make an educated guess as to which one to try. I am appreciative of the specific suggestion on which color to try. My friend has the set of cams so I will see if I can steal his set to play with...

Thanks for the help so far....