It's the 184 that has the flywheel gear stater.
The 184 has a completely different PTO that drives directly off the flywheel.
If I were to attempt a change over, I would investigate if 184 ring gear would fit on the 154 flywheel.
If it would be that simple, you would still need the generator or a different charging system.
If you have bad a starter/generator, you can buy a new one for about $125.