I just got finished installing my new, improved linkage with McMaster-Carr bushings. I went with the same bushings subysouth used, the 3/4" long ones. What. A. Pain. In. The. Ass!!!!!!!
From the roll pin that was impossible to get out to the 10mm bolt that was nearly impossible to get through the 3/8" bushings it just sucked all the way around. (I should have been smart enough to just enlarge the 8mm hole in the bracket to 3/8" and buy a 3/8" bolt to use, but I didn't bother
The shifter certainly feels markedly better, but I wouldn't want to go through that job again!