Flywheel/Clutch Size in the OD transmission

He has a slant to use with the 833OD and said he was gonna run the slant for awhile then swap to a 273. He's got both OD bellhousings. So what size flywheel is used with each motor/bellhousing. I would have thought they would have been using a 10" for both by then.

EDIT: I misspoke after talking with my friend. He will be going with a 273/235 after he is tired of the slant.