High speed idle not high speed idling.

[AirSpeed]

After I installed a new crate 350 in my truck the high speed idle on my Quadrajet isn't working right. It worked great for several years. I did clean all the years of goo off of it but was careful not to mess up any of the linkage. I cannot see the problem! I've messed around with it, trying to figure out how it operates but it's cold outside and the issue eludes me! It used to hold the throttle open just a little until it warmed up then shut off with a tap of the gas pedal. Anyone have a simple explanation what I should be looking for?