IH 120 Mower

[trailrider1205]

Needing to replace the guards on my 120 mower. Someone in the past put on all different styles. I'm not able to get the back of the knife to lay flat on the ledger plate. I've looked up the parts on Case and I've come up with the list below.
32 - MC20412
1 - MC20432
2 - 472717R2

Now the dealer is telling me I just need to use all of the same guard.
Just wondering if someone out there has one and know how they should be setup?

Thanks,
Matt