SkyJeep Flywheel replacement

The new flywheel and impulse coupling installation for the Viking Honda requires spacing the gearbox forward 1/4 inch causing cowling fit issues with the radiator ( mounted to the Gearbox).
This is my attempt to solve this problem by machining 1/8 inch from each side of the drive coupler.

[@stolaircraftsuyanto9728]

did you streamline the silencer?