I've never put one in so I don't really know what I'm talking about
here. But, I have read posts on Cal-Look where people did put them
in. That's pretty much how they work. I've heard it said that you
should mark where your shifter was sitting if you don't have a decent
recent mark. I've also heard people talk about fixing misalinged
shifters by losening the two plate bolts, putting the tranny in
reverse and tightenning it back down. I guess they are saying it's
more easily aligned in reverse??? Now, let's hope somebody who has
actually done it will chime in!