I did it to my old MTD and I am going to do it to my new to me JD1032D soon, It makes a huge difference. The wet slushy snow is where it really stands out as an improvement.
I didn't have to on my old one, but I haven't looked at this Deere that close, I do't think I will have to though, Drill 2 holes in each impeller blade and bolt them on.
I took the chute off and went in from the top. I looked at my Deere closer last night and it looks like I can do the same thing.
Are you using a pre-manufactured kit? I saw a video where the guy used old tire wall. That made a lot of sense to me.