No idea
I have lots of experience with the AD Boivin skid. Never ran anti rachets myself because there is absolutely no reason to. The way the skid is designed it simply will not rachet......you can have the track hang down two inches below the rails when the rear end is up in the air and it still wont rachet. That being said, I have a friend who has an AD Boivin and 8 tooth anti rachets and there are no contact issues at all. If you are considering 9 tooth anti rachets I have no idea if there will be any clearance issues.......but again....there is no reason to run them.
Madmatt