I know this is old and had similar issues as you... well those little sleeves need to be pressed in with a small press or use a smooth pair of channel locks they will go in easier this way. Might be a bit easier if the shifter is not installed yet when you do this. on to my next problem wtf is the spacer for lol well i did some studying and placed it between the washer and the shift linkage on the right side of the shifter my linkage was a bit muttled up so don't mind that here is a picture to show you how I used the spacer, it shifts cleanly through the gears and is pretty firm no slop.Well, I took my own pics of the problem.
This is as far as the washers will go inside the bearing, on both sides.
Other photo is of the actual hardware.
Someone on the Integra Forums is saying that the washer comes in 2 different sizes?
I am currently talking to Chris at Skunk2 about this.