by MTaylor » Wed Mar 04, 2015 6:08 pm
Yes, there are four bushings in the lower sliders, two on each side, and you can check the fit pretty close without measuring. Just slide your tube into the slider and check for a tight fit. There should be almost no movement.
From 52-67, a 3/8" stud went through the lower slider and was held on by a nut. In 68, they started using a 7/16" bolt that threaded into the bottom of the shock absorber. Sometimes, if the shocks have had water in them, the stud will be corroded and possibly dangerous.
Progressive makes a updated set of springs for 33.4 shocks. The springs are shorter and require the use of a spacer. The difference is not visible from the outside of the bike. I put a set in my 71 Superglide, hoping to make it less bouncy, and it seems to have helped a little.