8.25" rear end upgrade

I have a Mopar 8.25" rear end and would like to upgrade the brakes to a Wilwood Kit
#140-11395 with Parking Brake.
The instructions say I have to install an MO400 (Green Bearing with Snap Ring).
All the information I can find on the MO400 Bearing is for an 8.75".
The 8.25" dimensions on the Housing flange are the same as the 8.75". Only difference I see is the 8.75" has 5 holes and the 8.25" has 4. The four holes do lineup on both flanges.
Will the MO400 Bearing work in my 8.25" ?
Any help on this issue would be greatly appreciated.