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Yes, there is a seal - BASIC PART NUMBER 6411
The fluid is contained within the TORUS ASSY. The TORUS ASSY bolts to the flywheel.
There are two paper gaskets -
1) TORUS COVER to FLYWHEEL - BPN 7945
2) FLYWHEEL TO CS FLANGE - BPN 6377 (You indicated that you don't think you need that one)
NOTE - There is also a starter motor to bell gasket - BPN 6436