You disassembled everything up top. Regardless how it ran before it just makes sense to me that you would have to readjust the linkage when it was reassembled. Did you try to start/run the car without the linkage connected? That might tell you whether it's simply the linkage adjustment or something else like a vacuum leak.
Readjusted linkage, no difference. It was instinct to disconnect the linkage at idle to see if that was the issue for high idle.
