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.

Hi @Wayne Miller - did you successfully use Wilwoods on your 8.25 inch mopar rear end?

I'm putting Wilwoods on mine. The stock axle studs have a knurled section that is too long. It protrudes out past the wheel flange and keeps the Wilwood disc from seating on the flange.

If you used Wilwoods, did you find other studs to mount?