I have a 3406B, 4MG engine with a brakesaver. This engine has an 8 1/2" bore flywheel. I want to install a 10" bore so I will have a greater selection of newer model clutches to install. The issue is the brakesaver engine does not have a ring gear on the flywheel. I have been unable to find a part number for a flywheel with a 10" bore for a brakesaver engine. If anyone has any advice on this swap please let me know. Last resort would be to machine the current flywheel out to 10", I guess. Thank you for any help.