This Flange Goes on the Timing cover- Gear Drive or Extension to change it to a V Band 

Timing Cover Marmon Clamp Adapter - Allows Quick Change Clamp to be used on regular fuel pumps   has 2-125" Register for all pumps   

Adapter to mount to the timing cover or an extension and clamp with a Marmon clamp as a component to accept the Front Distribution Drive or Quick-Change Fuel Pump.  

The Companion is the flange on an RCD Drive or a V Band adapted fuel pump-   use RCD.  

                                                                              RCD-300705-01

use flange 82-202   for clamping fuel pump. 

O Ring is part #   351550-33 RCD  

This Marmon clamp mount will fit any RCD cover which has mounting holes for a RCD Economy pump extension, 'O" ring and four flat head bolts are included.